STRUCTURE, PARAMETERS AND INTERACTION OF SUPERSONIC JETS IN CONTEMPORARY VACUUM PUMPS,
Abstract
Influence of rarefaction of the medium (flow of air and vapor of vacuum oil) on the magnitude and distribution of parameters at the section of an axially symmetric nozzle with strong expansion was investigated. As a result of the investigation there is shown the dependence of diameter of isentropic flow core on degree of rarefaction of the medium and decrease of real Mach number M as compared to its value M sub id calculated without taking into account the influence of viscosity. Supersonic discharge of vapor and air from an axially symmetric nozzle into strongly rarefied medium under off-design conditions of discharge (underexpansion) was investigated. Investigation make it possible to obtain experimental data on the distribution of gas-dynamic parameters in the jet, and also to estimate the extent of the initial section of the stream for different values of deviation from design conditions. Interaction of two steam jets in a vacuum during discharge from two plane slot nozzles was investigated. In this part of the investigation determination is made of the change in structure of the jet during discharge from a system of nozzles as compared to that of a single jet, and there are given experimental data on distribution of parameters in the zone of interaction of two vapor jets.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 07, 1965
- Accession Number
- AD0622762
Entities
People
- N. I. Yushchenkova
- S. I. Kosterin
Organizations
- National Air and Space Intelligence Center