Advantages and disadvantages of centrifugal compressors with vane diffusers and without vane diffusers
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Who else knows clearly? Please explain. Thank you
This thing can actually be understood as a baffle designed to evenly distribute the fluid. In cases of extremely high flow rates where the area at the junction is large, guide plates must be installed to balance the fluid across various cross-sections. For low flow rates, it can be ignored and not set. (For reference)
I’ll answer it myself. The flow loss of a vaneless diffuser is greater than that of a vaneed one, but a vaneed diffuser is prone to rotational separation at low flow rates, resulting in surge. These are the results of my recent research; please correct me if there are any errors.
In the design of centrifugal air compressors, a diffuser is used to reduce the gas velocity and thereby increase pressure; it also serves a guiding function. Without a diffuser, the gas would exit directly through the exhaust port, resulting in unstable airflow and pressure levels!