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Parametric investigation of thrust augmentation by ejectors on a pulsed detonation tube (Document No: 20050215120)
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Paxson, Daniel E. Wilson, Jack Sgondea, Alexandru Rosenthal, Bruce N. |
| Copyright Year | 2005 |
| Description | A parametric investigation has been made of thrust augmentation of a 1 inch diameter pulsed detonation tube by ejectors. A set of ejectors was used which permitted variation of the ejector length, diameter, and nose radius, according to a statistical design of experiment scheme. The maximum augmentations for each ejector were fitted using a polynomial response surface, from which the optimum ejector diameters, and nose radius, were found. Thrust augmentations above a factor of 2 were measured. In these tests, the pulsed detonation device was run on approximately stoichiometric air-hydrogen mixtures, at a frequency of 20 Hz. Later measurements at a frequency of 40 Hz gave lower values of thrust augmentation. Measurements of thrust augmentation as a function of ejector entrance to detonation tube exit distance showed two maxima, one with the ejector entrance upstream, and one downstream, of the detonation tube exit. A thrust augmentation of 2.5 was observed using a tapered ejector. |
| File Size | 1163949 |
| Page Count | 16 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20050215120 |
| Archival Resource Key | ark:/13960/t21c6z80w |
| Language | English |
| Publisher Date | 2005-08-01 |
| Access Restriction | Open |
| Subject Keyword | Aircraft Propulsion And Power Stoichiometry Statistical Analysis Ejectors Thrust Augmentation Experiment Design Polynomials Pipes Tubes Air Unsteady Flow Parameterization Pulse Detonation Engines Gas Mixtures 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 |
