Mechanical Engineering - Compressors, Gas Dynamics and Gas Turbines - Discussion

Yes, you are right @Pavan.

Single acting reciprocating compressor has only suction (1st stroke) and delivery (2nd) but, the question asked is how many how stroke delivery that place in. So the obvious answer is 1stroke.

Single acting compressor has only two strokes on suction and other compressing and discharging.

Please explain the example how to came two stroke but why are no four stroke?

Internal combustion engine & and compressor are different. Things don't mix them.

At suction stroke piston suck low pressure & low temp. Air from atmosphere (piaton move to down) and then next stroke it compressed at high pressure &. Temp (piston move upward direction) then end of the compression stroke it release the air (delivery stroke) ie. In single acting compressor deliver air only in 2 stroke.

Don't compare ic engine and compressor here first stroke suction at this time inlet valve open outlet valve close and suction occurs upto some pressure and it closes then piston moves upwards then after reaching some pressure outlet valve opens this is done in same stroke. Delivery also in same stroke.

In a single acting reciprocating compressor there are four strokes.

1. Suction Stroke.

2. Compression Stroke.

3. Power stroke.

4. Exhaust Stroke (delivery stroke).

In this question asking about three strokes. While answer is given two stroke.