The ratio of the indicated power to the shaft power or brake power of the motor or engine required to drive the compressor, is called
The efficiency of a jet engine is higher at
The capacity of a compressor is expressed in
The increase in pressure in a roots blower is entirely due to back flow of air.
A large clearance Volume in a reciprocating compressor results in
The rotary compressors are suitable for large discharge of air at low pressure.
Intercooling in multi-stage compressors is done
The type of rotary compressor used in aeroplanes, is of
A closed cycle gas turbine gives __________ efficiency as compared to an open cycle gas turbine.
The stagnation pressure rise in a centrifugal compressor takes place
For a two stage reciprocating compressor, compression from p1 to p3 is with perfect intercooling and no pressure losses. If compression in both the cylinders follows the same polytropic process and the atmospheric pressure is pa, then the intermediate pressure p2 is given by
An axial compressor gives optimum performance at high speeds and large volume flows.
Gas turbine as compared to steam turbine
The total heat rejected in a reciprocating air compressor is equal to the sum of the heat rejected during polytropic compression per kg of air and heat rejected in the intercooler per kg of air.
The ratio of workdone per cycle to the stroke volume of the compressor is known as
In a reciprocating air compressor, the compression work per kg of air
The degree of reaction in an axial flow compressor is defined as the ratio of static enthalpy rise in the
Intercooling in gas turbines
In a jet propulsion
The clearance volume in the compressor is kept minimum because it effects on volumetric efficiency.
When the temperature of air leaving the intercooler, in a two stage compression with intercooler, is __________ the original atmospheric air temperature, then the intercooling is known as perfect or complete intercooling.
An open cycle gas turbine works on the same cycle as that of a closed cycle gas turbine.
The inlet pressure is always __________ the discharge pressure.
The temperature of air at the beginning of the compression stroke is __________ the atmospheric temperature.
Free air is the air at atmospheric conditions at any specific location.
The axial flow compressor is preferred in air-craft gas turbines because of
In a compressed air system, the temperature of air discharged from the air motor is __________ than the initial compressor intake temperature.
The performance of air compressor at high altitudes will be __________ as compared to that at sea level.
The compressor efficiency is defined as the ratio of volume of free air delivery per stroke to the swept volume of the piston.
A gas turbine used in air-craft should have low weight and small frontal area.
Please disable the adBlock and continue. Thank you.