2008•The proceedings of the JSME annual meetingOpen access

1802 A study on Gas Flow Characteristics of Orifice Restriction for Various Compressible Fluids

Seiichiro Asano, Tomoaki TAKEUCHI, Kenji Kawashima, Toshiharu KAGAWA, Syunsuke IKEDA

Abstract

In this paper, discharge coefficient of an orifice plate is measured for five different gases using an isothermal chamber. Mass flow rate of each gas through the orifice is obtained by measuring pressure in the chamber. In order to determine flow characteristics of the orifice for various compressible fluids, the following relations are obtained. Those are 1) the relation between a discharge coefficient and Reynolds number, and 2) the relation between non-dimensional pressure and its flow rate. It became clear from the experiment that discharge coefficient of the orifice shows same behavior even with different properties of compressible fluids.

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Available abstract

Key concepts: Body orifice, Discharge coefficient, Flow coefficient, Orifice plate, Compressibility, Mechanics, Isothermal flow, Reynolds number