QUASI-TURBINETHE NEXT GENERATION

ROTARY ENGINEPresentation by:

Rajnish Bhusal

Smriti Jha- Department of Mechanical Engineering, Reva ITM, Bangalore.

• ENGINES TODAY!• Reciprocating

• RotaryIntake Compression Ignition Expansion Exhaust

EnergyOverview of Piston Engine

Superior in past 2 centuriesCombustion occurs intermittently4 stroke Piston makes positive torque only 17% of time and drags 83% of timeMany reciprocating parts Problem in Balancing of engineHigher 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

Pollution

Not Used often

Quasi-Turbine (QURBINE)– Introduced by Dr. Gilles Saint- Hilaire– Uses rotor and housing design

CONSTRUCTIONTwo 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-turbineMotion of rotor Shape of housing

• Sequentially arranged Four StrokesSuction- Charge Pushes the rotor forward and starts its rotation

Compression- Volume of chamber formed is too small tremendous compression

Combustion- Ignition Complete combustionTremendous Energy Continuous combustion

Exhaust

Rotor gets closer and away from housing

Compression and Expansion

High compression ratio

• 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

Homogenous Fuel-air Mixture Heterogeneous Fuel-air Mixture

Spark-ignition Type IGasoline Engine

Type IIGasoline Direct-injection (GDI) Engine

Pressure-heated Self-ignition

Type IVPhoto-detonation Engine

Type IIIDiesel Engine

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 for PD?

Research Best mode of Combustion Photo-detonation

Extremely High Compression Ratio

Requires

Reciprocating Engine

Knocking

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.

Zero VibrationLess NoisyLess PollutionContinuous Combustion with lower temperatureBetter torque continuity and accelerationCompatible with Hydrogen

Limitations• Construction of rotor is bit difficult.

• Differential thermal expansion or contraction in copper and aluminum material lead to some incidences of leakage.

APPLICATIONS• High power-to-weight ratio Aircrafts

• No vibration Chainsaws, Snowmobiles, Parachutes, light boats

• Air Compressors, Supercharger

• Racing Cars, Pneumatic Engines

• Steam Vehicle

Conclusion• 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

Zero VibrationLighterLess noisyMore efficientLess pollutant (meets the Kyoto Protocol)

• What else we want!! SO LETS PONDER ON IT!!!

THANK YOU!!!And

Welcome to Post Piston Engine Era