Home » Mechanical Engineering » Compressors, Gas Dynamics and Gas Turbines

Axial-flow compressor operating regime: statement on best performance Statement: An axial compressor gives its optimum performance at high rotational speeds and large volume flows. Decide whether the statement is correct.

Q: Axial-flow compressor operating regime: statement on best performance Statement: An axial compressor gives its optimum performance at high rotational speeds and large volume flows. Decide whether the statement is correct.

Concept/Approach Axial-flow compressors are favored for high mass-flow applications and achieve good efficiency at high blade tip speeds (high rpm), handling large volume flows through multiple stages. Final Answer True

Difficulty: Easy

True
False

Correct Answer: True

Explanation:

Concept/Approach
Axial-flow compressors are favored for high mass-flow applications and achieve good efficiency at high blade tip speeds (high rpm), handling large volume flows through multiple stages.

Final Answer
True

← Previous Question Next Question→

More Questions from Compressors, Gas Dynamics and Gas Turbines

Effect of large clearance volume in a reciprocating compressor If the clearance volume of a reciprocating compressor is large, what is the primary effect on delivered flow? Choose the correct outcome.
Gas-turbine intercooling: effect on net work and thermal efficiency. Consider a simple gas turbine where intercooling is applied only between multistage compressors (no reheat and no recuperator). Assume the same compressor pressure ratio, the same turbine inlet temperature, and ideal intercooling to the initial compressor inlet temperature. Choose the correct combined effect on plant performance.
Rotary compressors: suitability for flow rate and pressure level. Evaluate the statement about application range: rotary compressors are preferred when a large volume flow is needed at relatively low delivery pressure. Decide if this statement is correct or incorrect.
Compressor definitions: identify the correct efficiency term. Definition target: the ratio of free air delivery (at standard condition) per stroke to the piston's swept volume. Select the correct name of this ratio.
Gas turbines compared with reciprocating I.C. engines: select the generally valid advantage Which statement best captures a generally valid advantage of a simple (open-cycle) gas turbine relative to a reciprocating internal combustion engine, without assuming combined-cycle additions?
Centrifugal compressor flow: location of highest Mach number leading to shock In a radial-flow (centrifugal) compressor, the flow accelerates through the impeller and then is decelerated in the diffuser. Considering where transonic conditions are most likely and where shocks originate, identify the location at which the highest Mach number typically occurs, leading to shock formation in the subsequent passage.
Gas turbine intake and compression In a simple open-cycle gas turbine, identify whether the working air is drawn from the surrounding atmosphere and mechanically compressed in a compressor before entering the combustor.
Two-stage reciprocating compressor with perfect intercooling Let p1 be the suction pressure to the low-pressure (LP) cylinder and p3 the delivery pressure from the high-pressure (HP) cylinder. For a single-acting, two-stage reciprocating air compressor with complete intercooling and equal piston speed/stroke, what is the correct ratio of cylinder diameters D1/D2 (LP/HP)?
Roots blower delivery frequency In a rotary positive-displacement compressor using a three-lobed Roots rotor, the trapped air pockets are transferred to the discharge how many times per rotor revolution?
Work saving with intercooling in multi-stage compression For a two-stage reciprocating air compressor, is the saving in compression work maximised with incomplete intercooling or with perfect (complete) intercooling between stages?

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion