<p>A series of experimental tests
were performed to study the transient response of gas/liquid injectors exposed
to transverse detonation waves. A total of four acrylic injectors were tested
to compare the response between gas/liquid and liquid only injectors, as well
as compare the role of various geometric features of the notional injector
design. Detonation waves are produced through the combustion of ethylene and
oxygen, at conditions to produce average wave pressures between 128 and 199
psi. The injectors utilize water and nitrogen to simulate the injection of
liquid and gaseous propellants respectively. Quantification of injector refill
times was possible through the use of a high-speed camera recording at a frame
rate of 460,000 frames per second. High frequency pressure measurements in both
the gaseous and liquid manifolds allow for quantification of the temporal
pressure response of the injectors. Variations in simulant mass flow rates,
measured through the use of sonic nozzles and cavitating venturis, produce
pressure drops up to 262 psi across the injector. Injector refill times are
found to be a strong function of the impulse delivered across the injector. Manifold
acoustics were found to play a large role in injector response as manifolds
that promote manifold over-pressurizations during the injector recovery period
recover quicker than designs that limit this response.</p>
| Identifer | oai:union.ndltd.org:purdue.edu/oai:figshare.com:article/13075955 |
| Date | 16 December 2020 |
| Creators | Kevin James Dille (9505169) |
| Source Sets | Purdue University |
| Detected Language | English |
| Type | Text, Thesis |
| Rights | CC BY 4.0 |
| Relation | https://figshare.com/articles/thesis/Transient_Response_of_Gas-Liquid_Injectors_Subjected_to_Transverse_Detonation_Waves/13075955 |
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