TWO-PHASE FLOW THROUGH APERTURES. Progress Report
An aperture with a 1/2-in. dia opening, tapered at 60 deg to a 11/2-in. dia opening, and 1/32 in. long is analyzed. The measurements include mass flow rates, pressure profiles in the aperture, and thrust measurements as functions of the initial pressure of saturated water in the vessel. The pressure remains constant along the length of the aperture and a critical pressure ratio of 0.3 is observed, independent of the upstream saturation pressure. Use of this ratio to evaluate the backpressure for the usual orifice equation leads to an accurate prediction of the mass flow rates. Thrust measurements are compared with predictions. Several models are used to estimate the quality. As yet, no model is successful in predicting in the back pressures in the aperture. (auth)
- Research Organization:
- Minnesota. Univ., Minneapolis
- DOE Contract Number:
- AT(11-1)-926
- NSA Number:
- NSA-18-016178
- OSTI ID:
- 4067665
- Report Number(s):
- TID-20336
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-64
- Country of Publication:
- United States
- Language:
- English
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