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<blockquote data-quote="Ranchero50" data-source="post: 385021" data-attributes="member: 1523"><p>Yeah, picked up some good books in a used book store over the years. 'Fluid dynamics' from the '50's is great for understanding stuff like this. I typically read deep enough to understand the subject without going through the math. I don't have a way to measure the forces involved so I need to understand the dynamics and results along with the data I can figure.</p><p></p><p>45mph is 66 feet per second. Water isn't compressible but air is. Cavitation happens during pressure drops when compressed air intrained in the pressurized fluid reduces pressure suddenly. Your abrupt wall is creating a pressure spike and the resulting reduction of pressure helps bring air bubbles into the water stream going into the impeller. You always want very smooth transitions</p></blockquote><p></p>
[QUOTE="Ranchero50, post: 385021, member: 1523"] Yeah, picked up some good books in a used book store over the years. 'Fluid dynamics' from the '50's is great for understanding stuff like this. I typically read deep enough to understand the subject without going through the math. I don't have a way to measure the forces involved so I need to understand the dynamics and results along with the data I can figure. 45mph is 66 feet per second. Water isn't compressible but air is. Cavitation happens during pressure drops when compressed air intrained in the pressurized fluid reduces pressure suddenly. Your abrupt wall is creating a pressure spike and the resulting reduction of pressure helps bring air bubbles into the water stream going into the impeller. You always want very smooth transitions [/QUOTE]
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