Regarding the pressure difference at the throat of axial flow fans
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This post was last edited by yxmqh on 2010-4-4 at 12:56. Dear fellow sailors, I’m a newcomer. When studying axial flow fans, I often come across the term \"throat pressure difference,\" which is also a condition for fan interlocks. May I ask which part of the fan does the \"throat pressure difference\" refer to? I would appreciate your advice.
The throat differential pressure generally indicates the amount of air drawn in at the inlet of the axial flow main fan. There seems to be a formula for calculating this value; a higher throat differential pressure means that more air is being drawn in, while a lower differential pressure indicates less air intake. In such cases, the main fan is prone to surge.
The throat pressure difference is the difference between the pressure measured at the inlet throat of the flow channel within the compressor and the compressor’s intake pressure. Refer to http://img.1kongyaji.com/apply/200806/2008060922503285.pdf
The so-called throat pressure difference refers to the use of a constricted pipe with special properties installed before the inlet guide vanes of the air compressor; as the fluid flows through this section, a pressure difference is created there (measured by a pressure transmitter). This pressure difference is related to the flow rate, and any change in resistance actually corresponds to a change in flow rate.
The throat pressure difference is an interlocked value for anti-surge, primarily related to the outlet pressure.