Quasi-turbine- The very efficient rotary engine in Mechanical field.
THE NEXT GENERATION
- Department of Mechanical Engineering, Reva ITM, Bangalore.
• ENGINES TODAY!
Intake Compression Ignition Expansion Exhaust
Overview of Piston Engine
Superior in past 2 centuries
Combustion occurs intermittently
4 stroke Piston makes positive torque only 17% of time and drags 83% of time
Many reciprocating parts Problem in Balancing of engine
Higher hydrocarbon emissions Pollution
Rotary Engine (Wankel Engine)
• three-sided symmetric rotor
• No reciprocating parts
• Has problem in rotor sealing
• Very slow combustion
• Poor emissions Major Problem
Not Used often
– Introduced by Dr. Gilles Saint- Hilaire
– Uses rotor and housing design
Two types of quasiturbine engine model
• Quasiturbine Model without Carriages
• Quasiturbine Model with Carriages
QURBINE WITHOUT CARRIAGES
• An oval housing
• Four sided rotor
• Inlet and exhaust port
• Spark plug
QURBINE WITH CARRIAGES
• Modifications for allowing Photo-detonation
• 4 carriages
• Each carriage consist 2 wheels
• Each blade has a filler tip and traction slots
• A pivot forms the end of each blade
Working of Quasi-turbine
Motion of rotor
Shape of housing
• Sequentially arranged Four Strokes
Suction- Charge Pushes the rotor forward and starts its rotation
Compression- Volume of chamber formed is too small tremendous compression
Rotor gets closer and
away from housing
• Combustion Modes in Engines and Quasi-Turbine
• If you ask a chemist: “ What may be the best method of combustion?”
• Answer would be: “ Photo-detonation”
Four Types of Internal Combustion Engines
Heterogeneous Fuel-air Mixture
Gasoline Direct-injection (GDI)
Photo-detonation in QT
• Possess Best attributes of the gasoline and diesel engine
• Tremendous compression fuel self-ignites.
• Employs homogeneous charge + compression ignition.
Homogeneous Charge Compression Ignition
• Rapid increase in Compression temperature
• The combustion is then driven by the intense radiation in the chamber.
• Complete combustion of the fuel, leaving behind no hydrocarbons
Why Quasi-turbine is only Compatible
Research Best mode of Combustion Photo-detonation
Pecularities of Qurbine
• Lets see what happens when comparing a 50cc four-stroke piston engine with a QT 50cc
Quasiturbine at the same rpm. Both engines have 50 cc maximum chamber volumes. The piston
engine will intake 50cc every 2 revolutions, while the Quasiturbine intakes 8 chambers x 50cc =
400cc in 2 revolutions. The Quasiturbine will intake 8 times more chambers and fuel-mixture, and
produces something like 10 times more power.
Continuous Combustion with lower temperature
Better torque continuity and acceleration
Compatible with Hydrogen
• Construction of rotor is bit difficult.
• Differential thermal expansion or contraction in
copper and aluminum material lead to some
incidences of leakage.
• High power-to-weight ratio Aircrafts
• No vibration Chainsaws, Snowmobiles, Parachutes, light
• Air Compressors, Supercharger
• Racing Cars, Pneumatic Engines
• Steam Vehicle
• Problems in developing next generation piston engine
• Several hundred million dollars can be saved in research spending
• This world requires more energy sector industry than computer industry
• Qurbine is the ideal motor for vehicles with
Less pollutant (meets the Kyoto Protocol)
• What else we want!! SO LETS PONDER ON IT!!!
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