Loss of efficiency due to recirculation
Balance holes may be drilled in the blade wheel to reduce the loading caused by this effect. This has the effect of increaseing the amount of recirculation, introduces a stress raiser and increases windage losses. To try to elleviate soem of this the bore is carefully radiused and polishedA certain amount of reaction is put on the blade by casuing a pressure drop across the blade to equal that caused by the eduction effect-approxiamtely 10% ( Degree of reaction = Enthalpy drop over blade/enthalpy drop over stage)
I am the author of most of the work on your website against which you are making financial gain. If you do not gain permission or remove it I will take further action. My site is non-commercial, I note you have placed content from marinediesels.info which is a commercial site, you are in breach of his copyright and as such ne may not be as generous in allowing you time to remove his work before taking further action.
ReplyDeletebrian