Quasi Turbine Essay Example for Free

similar Turbine Essay1.INTRODUCTION similar turbine is a zero vibration continuous burning at the stake roofy locomotive having quartet faces articulated rotor with a free and accessible centre rotating without vibration nor deceased quantify and producing a strong torque at low rpm under a assortment of modes and give the sacks. The quasi turbine is besides an optimization theory for extremely compact efficient locomotive locomotive engine archetype.It is a late engine impression from Canada which offers a design similar to that of political machinerousel engines still with the advantages of a sport turbine-all in spatial relation the confines of a sleeping room based on the shape of a Saint Hilaire skating skating rink profile. Each quasi(prenominal) turbine device is at the cross road of trey modern engines inspired by the turbines it perfects the diver, and improves on the Wankel. The quasi(prenominal) turbine results from a research initiated in 1993 aimed at unifying the compression and power turbine into adept entity. This invention is a new hybrid engine concept, midway between the piston and the turbine engine which requires comparatively few components such as stator with covers, rotating blades, rocking railroad carriages, wheels, and joints. Quasi turbine is also an environmental friendly engine, which contributes an engine concept free from atmospheric atom smasher pollution, noise pollution, thermal pollution etc. In this engine cleverness stays constant and optimum no matter the power of the unit.Inventors Francoise, Gilles, Roxan2.OBJECTIVESObjective of this invention is to provide a new engine concept unifying the compressor and power turbine into one entity that is a formal gas turbine engine. another(prenominal) object of this invention is to provide a low noise, perfectly balanced, zero vibration, low r.p.m engine, giving slight judgment of conviction to compression and expansion stroke and allowing mu ch(prenominal) time and intensiveness to the pulmonary tuberculosis fire stroke.A further objective of this invention is to provide a fast accelerating, zero dead time and to provide an engine al roughly universal to life force sources, which terminate assort efficiently on pneumatic, steam, hydraulic, liquid and gas fuel internal combustion. other objective is to provide an engine, which has a short compress peak, stale intake atomic number 18a characteristics, so that it is fit for word-painting detonation mode pure hydrogen fuel combustion.Another objective is to provide a high weight and volume den mystifyy engine, without unavoidableness of any valve, total valve or obstruction and within neither a crankshaft nor a take flightwheel.3. CONSTRUCTIONAL DETAILSpic The invention is an assembly of four carriages supporting the pivots of a four element, variable shape rotor, which is confined within a chamber (internal caparison counter wall-stator) based on the shape of a Saint Hilaire skating rink profile. This profile offers the rope components of the engine a bigger, more uniform radial path, enabling upper limit torque to be reached more efficiently than a normal combustion. Two lateral plane covers close the engine end. The rotor is represent of four pivoting blades playing a similar role as the piston or turbine blades. Each pivots sit into one of the four rocking carriages. Each carriage is free to rotate around the same pivot in such a way as to be continuously and precisely in run across with ho use counter. A central shaft is not needed for the engine to operate. It drop be driven through and through a set of coupling arms attached to the blades by means of traction slots and through a set of arm braces, the ends of which are refered to central shaft. The central shaft unit fuck be easily removed through the back cover central hold with out dismantling the engine.Pivoting blades are shaped with the filler tip to allow the contro l of residual volume in the upper and raze chambers at maximum draw configuration. Carriage wheels should be wide to reduce contact insistency with the counter wall. For smoother operation, roller bearings are inserted in the blades hook pivots.Intake, sparkle nagger and exhaust fumes ports are made either radially in the housing, or axial in the location covers, or both. In order to pass along the flame make a continuous combustion engine, a small channel(ignition flame exchange slot) located along the internal housing counter wall next to spark plug allows a voluntary flow back of hot gases into the next ready-to-fire combustion chamber. Screwing or unscrewing the spark plug can control the amount of flow. This channel is called ignition transfer cavity.An ignition-timing advance can be built-in by slightly shifting the effective position of spark plug and / or the channel.To help cooling and reduce lubrication, at least one of the lateral side covers has a massive centra l hole exposing the pivoting blades to central area of the rotor such that all split of engine are external, except for the carriage and wheels which are always in good thermal contact with the housing contour. Since the pestles are the only friction surfaces, the need of lubrication is minimized by an optimal choice of anti-friction materials.The housing, the pivoting blades and the carriages can be made of metal, glass, ceramic or plastic, the later mostly for compressor, ticker or water-hydraulic engine application.In a film-detonation engine because it employs a homogenous charge and compression ignition, it is often described as a HCCI engine . HCCI (Homogeneous charge Compression Ignition) combustion results in Virtually no emissions and superior fuel efficiency. This is because photo detonating engines completely combust the fuel, leaving behind no hydrocarbons to be treated by a catalytic converter or simply expelled into the air. The higher pressure needful for Photo-d etonation puts a significant amount of focusing on the engine itself. Piston engines cant withstand the violent force of the detonation.And traditional rotary engines such as the Wankel, which remove longer combustion chambers that limit the amount of compression they can achieve, are incapable of producing the high- pressure environment necessary for Photo detonation to occur. The Quasi turbine with carriages is strong becoming and compact enough to with stand the force of Photo-detonation and allow for the higher compression ratio necessary for pressure heated self-ignitionpicquasi(prenominal) TURBINE SPECIFICATIONSHAFT POWER ROTOR DIAMETER ROTOR THICK 70 HP 10cm 5cm 530 HP 25cm 10cm 4000 HP 53cm 20cm 33000 HP 1m 16inch 260000 HP 2m 82cm 4. THE WORKING OF A SIMPLE QUASI TURBINEpicThe simpler Quasi turbine model looks very much like a traditional rotary engine A rotor curves inside a nearly watermelon-shaped-shaped housing, Notice, however that the Quasi turbine rotor has four elements instead of three. The sides of the rotor seal against the sides of the housing, and the corners of the rotor seal against the inner periphery, dividing it into four chambers. In a piston engine, one complete four-stroke wheel around produces two complete revolutions of the cranks shaft. That means the power output of a piston engine is half a power stroke per one piston revolution. A Quasi turbine engine, on the other hand, doesnt need pistons. Instead, the four strokes of a typical piston engine are arranged sequentially round the oval housing. Theres no need for the cranks shaft to perform the rotary conversion a in basic model, its very easy to chance the four cycles of internal combustion. Intake , which draws in a categorization of fuel and air Compression, which squeezes the fuel air mixture into a smaller volume. Combustion , which uses a spark from a spark plug to ignite the fuel. Exhaust, which expels waste gases (the by-products) from the engine.5. WORKING OF QUASI TURBINE WITH CARRIAGES.picIn a Quasi turbine, as the rotor blade turn the volume of the chambers change. First the volume increases, which allows the fuel air-mixture to expand. Then the volume increases, which allows the fuel air-mixture to expand. Then the volume decreases, which compresses the mixture into a smaller space. It is also show that when one combustion stroke is ends then the next combustion stroke is ready to fire. By fashioning a small channel along the internal housing wall next to the spark plug, a small amount of hot gas is allowed to flow back to the next ready to for combustion chamber when each of the carriage seals passes over the channel. The result is continuous combustion, just like in the airplane gas turbine.What all this amounts to the Quasi turbine engine is increased efficiency and performance. The four chambers produce two serial circuits. The first circuit is utilise to compress and expand during combustion . The second is used to expel exhaust and intake air, kin one revolution of the rotor, for power strokes are created. Thats eight times more than a typical piston engine Even a Wankel engine, which produces three power strokes per rotor revolution, cant match the performance of a Quasi turbine .6. COMPARISON BETWEEN QUASI TURBINE AND WANKEL ENGINE1. The Wankel engine uses a rigid three-face rotor with a crankshaft. The quasi turbine uses a deformable four faces rotor without a Crankshaft. 2. The Wankel engine shaft turns at three times the rotor RPM. The quasi Turbine rotor and primary(prenominal) shaft turns at same RPM Speed. 3. The Wankel engine fires only once per revolution The quasi turbine fires 4 times per main shaft revolution, producing Exceptional torque continuity. 4. When the Wankel engine rotor goes from one T.D.C to next, the Torque increases to a maximum revalue and starts decreasing right Away (progressive). The torque generated by the quasi turbine gets rapidly to a pl ateau, and hold this maximum for a long arc before decreasing, giving a better overall mechanized competency conversion rate.5. The Wankel engine has a dead time. The quasi turbine strokes are consecutive with no dead time. 6. The Wankel engine can not be operated in diesel mode due to the excess expansion volume which adiabatically cools down the combustion. Quasi turbine has no excessive volume and can run in diesel Mode. 7. callable to its one single fire per shaft revolution and the dead time, the Wankel engine needs a flywheel. Quasi turbine does not need a flywheel, and consequently has faster acceleration. 8. Since the Wankel engines shaft rotates at three times its rotor speed, it is not suitable for low rpm compressor or pumps. only when quasi turbine is suitable for this.7.COMPARISON BETWEEN QUASI TURBINE AND CONVENTIONAL TURBINECONVENTIONAL TURBINEThe conventional turbine is a continuous flow engine at intake and exhaust. As the conventional turbine do not convert the pressure forces but rather energising skill of rapid flows, it is then necessary to convert the pressure forces in high speed flows by a channeling or by oriental expansion. This intermediatory conversion is particularly complex. And in this case some of energy will be lost mainly due to viscosity, turbulence, and some of thermal conduction of hot gases.The conventional turbine is generally located where the flow is fastest. Also a complete conversion of kinetic energy into automatonlike energy is not occurred in a conventional turbine. In many applications one has flow swiftness near the sound speed where any instability, impurity or condensate may damage the turbine.QUASI TURBINEAs the conventional turbine, the quasi turbine is a continuously flow engine at intake. And exhaust Quasi Turbine, which turns under the effect of static forces and does not make use of hydro or aerodynamic flow properties. wherefore Quasi Turbine converts the potential forces directly into mechanica l energy. Because the Quasi Turbine operates under the effect of static forces, it cannot be change by saturated steam, by small impurities in the fluid flow.8. COMPARISON OF QUASI TURBINE AND I.C ENGINE1. In I.C engine piston makes positive torque only 17% of the time and drag 83% of the time. This is not the case in Quasi turbine. 2. In I.C engine gas flow is not unidirectional, but changes directions with the piston direction. But in Quasi turbine it is unidirectional. 3. In I.C engine valve inertia being a serious demarcation line to the engine revolution. In Quasi turbine there are no valves. 4. The duration of the piston rest time at top and bottom are without necessarily too long in I.C engines. But it is not the case for Quasi turbine. 5. In I.C engine there is quite important noise level and vibration. But it is not the case for Quasi turbine. 6. In I.C engines accessories like cam shaft uses a substantial power , but in Quasi turbine there is no need of cams 7. In I.C en gine lubricant is to be used as heat coolant, which require a Cumbersome oil pan. But Quasi turbine requires no lubrication. payoff of expansions In every two Volume of each revolutions Chamber Piston4 strokes 50cc 1 (Gasoline) Piston 2strokes 50cc 2 (Gasoline) Wankel 4 strokes 50cc 6 Qurbine 4strokes 50cc 8 (Gasoline) (Gasoline) Qurbine2strokes 50cc 16 Qurbine (steam/pneumatic) 50cc 16 9. QUASITURBINE FEATURES1. Zero vibrationIn quasi turbine, rotor rotates with a fixed centre of gravity and the Engine is perfectly balanced so there is no happen of vibration.2. Less noisyFor comparable power, the quasi turbine is much quieter than the piston engines, since it splits each expansion into four per turn and evacuates the gases more gradually and on a greater angular displacement3. Less pollutionAs the quasi turbine expansion starts quicker than in the other engines, there will be less time for the NOx formation, and less transfer of heat to the engine block.4. Continuous Combustion with get temperatureDue to an preliminary expansion than in he piston engines, initial energy is immediately transferred in to mechanical energy without awaiting the middle of the stroke as in the piston engines. This initial expansion cools immediately the combustion gases, which have less time to transfer their heat to the engine block. So continuous combustion is possible with lower temperature.5. Better torque continuity and AccelerationThe Quasi turbine has jointed torque impulses without the assistance of a flywheel. This gives a better torque continuity for quasi turbine. Flywheel is the main obstacle to engine acceleration. Since Quasi turbine has no fly wheel it gives fast acceleration.6. More effective conversion into Mechanical energyFor a better mechanical energy extraction, compression impulses should be as short as possible. The Quasi turbine has this assymmetry by compressing the mixture in a smaller angular zone and by using a greater angular displacement for the expansion.7. Not sensitive to detonationDue to the earlier expansion process, quasi turbine reacts better to photo detonation.8. Compatible with HydrogenThe Quasi turbine meets the fundamental criteria imposed by the Hydrogen engine of the future (that is cold intake area, low sensibility to detonation, less pollutant, robust and energy efficiency).10. APPLICATIONS1. Quasi turbine aviationIn a propellor airplane, weight reduction allows a larger payload, space saving allows to reduce the aerodynamic drag, absence of vibration increases instruments reliability and flight comfort, the noise reduction increases the discretion level, the high torque allows the use of multi-blades propeller and the better intake characteristic of the Quasi turbine allows higher flight altitude. In a helicopter, a large diameter Quasi turbine could generate enough torque to directly drive of the rotor blades without any gearbox, opus making much less noise. So Considering the high p ower niggardness, the low cross section area and the exceptional intake characteristics of the Quasiturbine, it is reasonable to expect to conceive an airplane engine2. Quasi turbine Stirling engineIn the Quasi turbine Stirling, all the engine shell is pressurized with helium, so that the inter-chambers leaks are automatically recycled by the central region, and required only sealing of a turning shaft (comparatively to the sealing of the back and forth piston connecting rods, unless sealed machines, which the Quasi turbine also can be). The Stirling engines are also known to be large and heavy, which the Quasi turbine-Stirling concept should solve.3. Quasi turbine pneumatic engineSince the Quasi turbine is a pure expansion engine (which the Wankel is not, neither most of other rotary engines), it is well suitable as compressed fluid engine Air engine or air motor. The pneumatic engine does not show any vibration on the shaft. It does run in heavy smoke or under water as well.4. Quasi turbine hotfoot carFormula Quasi turbine is a proposal to take aim and built of a racing car using the new Quasi turbine. rotary engine. Because the Quasi turbine has a much higher specific power density than the piston engine. A single Quasi turbine. rotor of about 50cm in diameter and 20cm thickness could kick downstairs 1000 H.P. at only 3000 rpm.Absence of flywheel would allow much higher acceleration. It is proposed to have the racing car with a differential clutch coupling (no gear box at all). This would much improve the racing cars endurance.5. Quasi turbine hydrogen engine modelA good way to store Hydrogen is to link it with carbon atom. Quasi turbine prefers Hydrogen retention in Carbon molecules. This Hydrogen Carbon molecule storage technique is safe and simple and has been appreciated by humans for centuries under the name of Hydrocarbon fuels.6. Quasi turbine pumpsQuasi turbine is a very compact and light device without Power shaft, which allows to pump large volume. In the pump mode the Quasi turbine has two intakes and two exits.11.CONCLUSIONFor over 50 years, researches have been dreaming about the improve engine, having uniform combustion, with a small combustion chamber (high compression ratio). This is what the Quasi turbine does by producing much shorter pressure pulses, and further more accepting photo-detonation.Quasi turbine eliminates all the energy wastes occurring in piston and Wankel engine and also it can satisfy modern engine criteria. The research is going on to further improve and develop this highly innovative concept and for creating commercially viable prototypes of Quasi turbine. In future we can see more developments happening in the field of quasi turbine.12.REFERENCE1. www.quasiturbine.com2. www.me.berkeley.edu/cal/QT.3. http//quasiturbine.promci.qc.ca4. http//kairos.dsa.uqam.ca/tycoon/Quasiturbine5. Quasiturbine Article by Lawrence Tse.