A SIMPLE BUT EFFICIENT EQUIPMENT FOR EXPERIMENTAL DETERMINATION OF VALVE LOSS COEFFICIENTS UNDER COMPRESSIBLE AND STEADY FLOW CONDITIONS

摘要

A brief introductory survey, of equations defining effective mass flow rate and loss coefficients, based on the theory of one-dimensional steady flow, is given. Then an experimental arrangement for compressor valve investigations is presented. This test set-up makes use of a supersonic wind tunnel equipment and enables one to study the flow properties of a valve over a wide range of pressure ratios. The performance of experiments is described and typical results gained from an investigation of a multi-ring plate valve are discussed in more detail.