I need to find a cheap way to keep the water at a calibration facility for flowmeters clean. Chlorination is not an option because the water is dumped from time to time into the local sewer and I am told that this will not fly with the city. If anybody has a enviornmentaly sound solution that is...
A while ago I saw a picture of a General Electric turbofan that had wavy fan blades. After reading these postings it seems to me that they are designed that way to prevent the phenomena explained here. Does anybody know if this is the case, and if so could they provide a little more information...