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Amplification of reynolds number dependent processes by wave distortion. [acoustic instability of liquid propellant rocket engines
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Purdy, K. R. Fang, J. C. Ventrice, M. B. |
| Copyright Year | 1975 |
| Description | A system using a hot-wire transducer as an analog of a liquid droplet of propellant was employed to investigate the ingredients of the acoustic instability of liquid-propellant rocket engines. It was assumed that the combustion process was vaporization-limited and that the combustion chamber was acoustically similar to a closed-closed right-circular cylinder. Before studying the hot-wire closed-loop system (the analog system), a microphone closed-loop system, which used the response of a microphone as the source of a linear feedback exciting signal, was investigated to establish the characteristics of self-sustenance of acoustic fields. Self-sustained acoustic fields were found to occur only at resonant frequencies of the chamber. In the hot-wire closed-loop system, the response of hot-wire anemometer was used as the source of the feedback exciting signal. The self-sustained acoustic fields which developed in the system were always found to be harmonically distorted and to have as their fundamental frquency a resonant frequency for which there also existed a second resonant frequency which was approximately twice the fundamental frequency. |
| File Size | 5617707 |
| Page Count | 58 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19760006113 |
| Archival Resource Key | ark:/13960/t4pk55g44 |
| Language | English |
| Publisher Date | 1975-06-01 |
| Access Restriction | Open |
| Subject Keyword | Spacecraft Propulsion And Power Resonant Frequencies Combustion Stability Reynolds Number Hot-wire Anemometers Acoustic Instability Feedback Control Liquid Propellant Rocket Engines Combustion Chambers 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 |
