Accession Number : AD0258194

Title :   A FIRST ORDER SOLUTION FOR THE IMPINGEMENT DRAG OF CYLINDERS AND SPHERES IN A STEADY PARTICLE-LADEN GAS FLOW

Corporate Author : STANFORD RESEARCH INST MENLO PARK CALIF

Personal Author(s) : SAUER,FRED M.

Report Date : JUN 1961

Pagination or Media Count : 1

Abstract : Drag due to impingement of particles on spheres and cylinders in a steady, particle-laden gas flow has been derived using NASA results for particle collection efficiencies for these targets. This analysis shows impingement drag to be a function of particle inertia parameter, the particle reflection coefficient on impact with the target, particle and target Reynolds numbers, listed in order of importance. For target Reynolds numbers greater than 1000, scaling of experimental impingement drag data should be based primarily on the particle inertia parameter. Consequently, small targets, e.g., models, will be expected to experience greater particle drag effects than do large targets under the same flow conditions. Comparison of theoretical results with the relatively few available total drag data show discrepancies in numerical values of 2:1 or larger, some of which may be due to questionable experimental results. (Author)

Descriptors :   *GAS FLOW, *LOAD DISTRIBUTION, *SHOCK WAVES, CONSTRUCTION, CYLINDRICAL BODIES, PARTICLES, PRESSURE, SPHERES, STRUCTURES

Distribution Statement : APPROVED FOR PUBLIC RELEASE