Performance Investigation of a Centrifugal Compressor -Part ۱: Experimental Study

In this research a turbocharger centrifugal compressor with vane-less diffuser and spiral volute is investigated for deriving its performance curves experimentally as well as numerically. In this paper, the ۱st part of this research is presented. The test rig is equipped to measure total and static pressure and temperature at the inlet and outlet ofcentrifugal compressor components. Mass flow rate for each rotational speed is measured using both orifice plate for low mass rates and bell mouth for higher mass flow rates for covering wide operating range of the compressor. The tests are carried out for five rotational speeds from ۳۰,۰۰۰rpm to ۷۰,۰۰۰rpm, and variation of total pressure ratio and total to total efficiency versus mass flow rates are derived. Also geometry of the compressor components are obtained accurately and a numerical model is prepared. Numerical results show good agreement with experimental data in tested mass flow rates and rotational speeds.

کلیدواژه ها:

Centrifugal compressor ، turbocharger ، Cold test ، Orifice plate ، Bell mouth