Abstract
The unsteady flow characteristics of a forward multi-wing centrifugal fan under a low flow rate are studied using the computational fluid dynamics (CFD) method. This paper emphasizes the eddy current distribution in terms of the Q criterion method, as well as pressure fluctuation, frequency spectrum, and kinetic energy spectrum analysis of internal monitoring points in a forward multi-wing centrifugal fan. The numerical results show that abnormal eddies mainly appear at the volute outlet and near the volute tongue, boundary layer separation occurs near the suction surface of the blade, and shedding eddies appear at the trailing edge of the blade with the time evolution. The unsteady flow characteristics of a forward multi-wing centrifugal fan at a small flow rate provide significant physical insight into understanding the internal flow law.
Highlights
The rotation stall phenomenon of a centrifugal fan under small flow conditions destructively strikes centrifugal fans
Based the above flow in a on centrifugal fan.discussion, we mainly studied the flow field characteristics of a centrifugal the above discussion, we mainly studied the flow field characteristics of a centrifugal fan in low flow The unsteady flow characteristics of centrifugal fan at a small flow rate are fan in low to flow conditions.the
The unsteady flow characteristics of the centrifugal fan are comprehended by analyzing the variation of the internal flow field with time evolution
Summary
The rotation stall phenomenon of a centrifugal fan under small flow conditions destructively strikes centrifugal fans. The unsteady flows for a forward multi-wing centrifugal fan are essential to study the rotation stall flow field characteristics at small flow conditions. Reported the complete unsteady flow of a centrifugal fan impeller-volute system by implementing three-dimensional numerical simulations. The above discussion, we mainly studied the flow field characteristics of a centrifugal fan in low flow The unsteady flow characteristics of centrifugal fan at a small flow rate are fan in low to flow conditions.the. This provides a precondition for avoiding end of the blade—will cause a pulsating reaction in the volute port This provides a precondition for unstable phenomenon of a centrifugal fan in low flow conditions and increasing the safety. This paper avoiding the unstable phenomenon of a centrifugal fan in low flow conditions and increasing the is organized as follows.
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