Accession Number : AD0700790

Title :   THE CERTAIN PECULIARITY OF OVEREXPANSION OF SUPERSONIC FLOW IN A CYLINDRICAL PIPE,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Tarasov,F. F.

Report Date : 29 SEP 1969

Pagination or Media Count : 11

Abstract : The results are given of experiments with supersonic airflow in a cylindrical pipe. The configuration and dimensions (in millimeters) of the pipe are shown: (1) the Laval nozzle; (2) a set of Hg manometers for measuring the static pressure; and (3) the pipe with asbestos insulation. The ultrasonic flow was generated by means of two vacuum pumps operating in parallel. The results of pressure measurements are shown. The distribution of the normalized (reatmospheric) pressure is shown with respect to the pipe length. The lower curve corresponds to the existence of supersonic flow in all parts of the pipe. The other curves correspond to the overexpansion of the flow with 'pseudo-jumps'. The increase in the pressure in the region of 'pseudo-jumps' measured during the experiments exceeded the theoretically predicted values. (Author)

Descriptors :   (*PIPES, *SUPERSONIC FLOW), CYLINDRICAL BODIES, LAVAL NOZZLES, PRESSURE, DISTRIBUTION, USSR

Subject Categories : Aerodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE