INTERACTION OF HIGHLY UNDEREXPANDED JETS WITH SIMULATED LUNAR SURFACES

Abstract

Pressure distributions and erosion patterns on simulated lunar surfaces (hard and soft) and interference effects on two representative lunar vehicles (cylindrical and spherical) were obtained with cold-air jets at various descent heights and nozzle pressure ratios to 288,000. Effects of varying the nozzle area ratio and the nozzle contour were obtained. The effects of clustering nozzles, a surface discontinuity, and operation at 5 degrees inclination from vertical were briefly investigated. Pressure measurements and schlieren photographs are presented. (Author)

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1961
Accession Number
AD0268739

Entities

People

  • Leonard E. Stitt

Organizations

  • National Aeronautics and Space Administration

Tags

DTIC Thesaurus Topics

  • Clustering
  • Discontinuities
  • Measurement
  • Nozzle Area Ratio
  • Nozzles
  • Photographs
  • Photography
  • Pressure Distribution
  • Pressure Measurement

Readers

  • Aerodynamics/Aeronautics.
  • Combustion and Flow Dynamics.
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering

Technology Areas

  • Space
  • Space - Hall-Effect Thruster
  • Space - Orbital Debris