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Mechanical characteristics of stability-bleed valves for a supersonic inlet. [for the yf-12 aircraft
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Cole, G. L. Dustin, M. O. Neiner, G. H. |
| Copyright Year | 1977 |
| Description | Mechanical characteristics of a set of direct-operated relief valves used in a throat-bypass stability-bleed system designed for the YF-12 aircraft inlet are described. A comparison of data taken before and after the windtunnel tests (at room temperature) showed that both the effective spring rate and the piston friction had decreased during the wind tunnel tests. In neither the effective spring rate nor the piston friction was the magnitude of change great enough to cause significant impairment of overall system effectiveness. No major valve mechanical problems were encountered in any of the tests. During high temperature bench tests, piston frictional drag increased. The friction returned to its initial room temperature value when the stability-bleed valve was disassembled and reassembled. The problem might be solved by using a different material for the piston sleeve bearing and the piston rings. |
| File Size | 19772448 |
| Page Count | 41 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19780005120 |
| Archival Resource Key | ark:/13960/t9j43jt80 |
| Language | English |
| Publisher Date | 1977-12-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Propulsion And Power Flow Stability Yf-12 Aircraft Wind Tunnel Tests Supersonic Inlets Inlet Flow High Temperature Bypasses Relief Valves Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
