Power required from forced induction?

[James125]

I'm trying to calculate the power required from forced induction with this equation;

W˙=m˙CpT1ηc⎡⎣(P2P1)(γ−1γ)−1⎤⎦

However I seem to be getting rather low results for work ~0.8W I have done my calculations in this spreadsheet. Any ideas where I've went wrong?

thanks

Note the file is .xls not .xlsx I had to change it to upload

 

[SteamKing]

File doesn't open for me. Please try to repost. Others have posted .xlsx files before.

 

[James125]

You can open the original file if you change the extension manually. Never to worry I have worked out how to save as xlsx. Missed out a factor of 2 first time round (forgot about it being 4 stroke). I still seem to be a factor of 1000 or so out. I have ~0.4w

 

[SteamKing]

Do you have a source for the equation in the OP?

 

[James125]

Do you have a source for the equation in the OP?

post #20 https://www.physicsforums.com/showthread.php?t=395212&page=2

I would have asked on that thread but it's closed