Compressor issues
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Maximum flow limit； When the rotational speed remains constant, the exhaust pressure decreases as the flow rate increases; when the flow rate reaches a certain level, the pressure drops almost simultaneously. This is something I read in a book. I don’t quite understand it, nor am I sure if it’s correct or not. Could anyone help explain it? Thank you
Simply put, the work done by the compressor is converted into static pressure energy and kinetic energy, with losses occurring as the gas passes through the impeller. When the flow rate reaches a certain level, the kinetic energy and the losses during gas passage through the impeller reach their maximum values; all of the theoretical energy available to the gas is then lost due to these flow losses, and thus the gas pressure cannot increase.
The principle behind this pump is the same; it’s just a simple conversion, where kinetic energy is transformed into static pressure energy through the diffuser channels
Reply to 2# cdpchyok: I agree with your view. The total amount of energy remains constant; when kinetic energy increases, static pressure energy decreases. This can be simply expressed as w=△U²/2g+△p/ρg+q_loss