The compressible discharge of air through small thick plate orifices

✍ Scribed by Jackson, R. A.

• Publisher: Springer
• Year: 1964
• Tongue: English
• Weight: 269 KB
• Volume: 13
• Category: Article
• ISSN: 0003-6994
• DOI: 10.1007/bf00382051

✦ Synopsis

The choking of nozzles at pressure ratios below the critical has long been understood. Knife edge orifices however do not appear to choke. This can be explained and the variation of discharge coefficient v«ith pressure ratio may be calculated. The present paper is all experimental investigation into the discharge through thick plate orifices when the pressure ratio is in the vicinity of its critical value. A comparison is made with the results of other workers and an attempt is made to explain the discharge characteristics of thick plate orifices. Notation C discharge coefficient D orifice diameter P absolute static pressure T thicklleSs of orifice plate Su//ixes c critical pressure d downstream conditions i incompressible flow conditions u upstream conditions DISCHARGE OF AIR THROUGH SMALL

the author wishes to thank Mr. L. M i l l e r for assistance with the measurement of the orifices.