Accession Number:

AD0780950

Title:

The Effect of Gas Diffusion and Vaporization on the Entrainment Coefficient for a Ventilated Cavity

Descriptive Note:

Technical memo.

Corporate Author:

PENNSYLVANIA STATE UNIV STATE COLLEGE APPLIED RESEARCH LAB

Personal Author(s):

• Billet, Michael L.
• Weir, Donald S.

Report Date:

1974-01-24

Pagination or Media Count:

31.0

Abstract:

A method is presented for determining the effect of gas diffusion and vaporization on the volume flowrate of gas needed to sustain a ventilated cavity. The analysis for the gas diffusion effect is based on a mathematical model of diffusion which accounts for changes in flow velocity, body scale, model geometry, and air content. Experimental studies compare favorably with the analysis. Also, a scaling relationship is proposed for ventilated cavity flows.

Descriptors:

• *CAVITATION
• *FLUID DYNAMICS
• CAVITIES
• DIFFUSION
• EQUATIONS OF MOTION
• FLOW FIELDS
• FLOW RATE
• GAS DYNAMICS
• MATHEMATICAL MODELS
• MODEL TESTS
• SCALING FACTOR
• STATISTICAL ANALYSIS
• VENTILATION

Subject Categories:

• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE