negative efficiency!!

November 24, 2003, 20:44

When I simulate a turbine impellor's flow,the efficiency is negative,Why!

November 25, 2003, 20:24

Hello Zhang,

Solver blows up, incorrect BC or rotationary settings may lead to such problems.

However, we would like to invite you to send email to support@numeca-beijing.com , describing you case details, your settings, etc. We then can process this support request.

Regards

Support center of NUMECA-BEIJING

September 26, 2004, 22:41

this may be due to defining rotatin axis

give value for rotaing axis as -1 instead of +1

Bye

November 24, 2003, 20:44	negative efficiency!!	#1
firespring Guest Posts: n/a	When I simulate a turbine impellor's flow,the efficiency is negative,Why!

November 25, 2003, 20:24	Re: negative efficiency!!	#2
NUMECA-Beijing Guest Posts: n/a	Hello Zhang, Solver blows up, incorrect BC or rotationary settings may lead to such problems. However, we would like to invite you to send email to support@numeca-beijing.com , describing you case details, your settings, etc. We then can process this support request. Regards Support center of NUMECA-BEIJING

September 26, 2004, 22:41	Re: negative efficiency!!	#3
SAM Guest Posts: n/a	this may be due to defining rotatin axis give value for rotaing axis as -1 instead of +1 Bye

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