CERTAIN FEATURES OF SUPERSONIC FLOW IN ACTIVE GRIDS: FORMATION OF SUPERSONIC FLOW AT THE ENTRANCE TO THE GRID OF THE PROFILES, THE CONDITION OF PERIODICITY OF THE FLOW IN FRONT OF THE GRID,
Abstract
Supersonic flow at the entrance to an isulated grid with an infinite number of profiles can take place at only one inflow angle, which depends on the radius of curvature and the inclination of the back of the profile to the front of the grid and on the number M1. When the entrance angle of the supersonic flow into a noninsulated grid is arbitrary, periodicity of the flow is only observed in an interval which is a multiple of the pitch of the grid guide. For this reason when the stages of the turbine are designed for supersonic flow velocities, it is necessary to consider the working grid together with the nozzle apparatus, and during experimental research it is necessary to make the flow in the nozzle and working vane system periodic. When the velocities at the entrance to the grid are supersonic, the outflow angle depends on the inflow angle. The deviation of the flow in an oblique cut can be calculated by standard formulas only under 'cut-off' conditions. Non-jump flow in the channel of the grid can be made to occur with an intervane channel of greater width than would appear from Meyer's solution for an insulated curvilinear wall. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 23, 1963
- Accession Number
- AD0619012
Entities
People
- A. V. Gubarev
- V. E. Deich
Organizations
- National Air and Space Intelligence Center