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

Discussion Forum : Compressors, Gas Dynamics and Gas Turbines - Section 1 (Q.No. 4)
4.
The volumetric efficiency for reciprocating air compressors is about
10 to 40%
40 to 60%
60 to 70%
70 to 90%
Explanation:
No answer description is available. Let's discuss.
Discussion:
8 comments Page 1 of 1.

Enushreddy said:   4 years ago
Volumetric efficiency is the ratio of the volume of free air delivery per stroke to the swept volume of the piston.

Suraj Kumar said:   6 years ago
It is ratio of effective swept volume to the swept volume.

Vipul kumar said:   7 years ago
It is the ratio of an actual amount of air sucked to the total volume of a reciprocating cylinder.

Dharmveer said:   7 years ago

Siva prakash said:   8 years ago
I can't able to understand this. Someone help me.

Nikhil mangrulkat said:   9 years ago
Voletric efficiency=Vas/Vs, Vas-actual suction of air between top dead center to bottom dead center.

Vs-Vas+clearance volume. Clearance volume = 0.1 to 0.15.

Sunil Kumar said:   9 years ago
Volumetric efficiency = (Swept volume/(clearance volume+swept volume)), swept volume is volume swept by piston in cylinder.

Clarence volume is about only 10-15% of total volume. So volumetric efficiency of engine could be more than 70%.

Prasu said:   9 years ago
Can any one explain it please.