Compressible Flow Question?

[javierb14]

does anyone have any experience with turbocharged cars? ive been debating with a few of my friends over the placement of a compressor bypass valve or blow off valve on the charge piping. some say it works best nearest the throttle body and others say it works best nearest the outlet of the compressor. correct me if im wrong, but i belive the valves basic function is to prevent compressor surge by preventing shockwaves. anyone have any good recommendations on websites and or books that discuss compressible flow?

thanks
javier

 

[denniskb]

You are right about the primary purpose being to prevent surge.

For this purpose the blow off valve should be as close as possible to the compressor.
Dennis Kirk Engineering

http://www.ozemail.com.au/~denniskb

 

[yilak]

can any body tell me about surge margine?