Lawson, Joel M. and Austin, Joanna M. (2018) Design of Conventional and Detonation-Driven Hypervelocity Expansion Tubes. In: 2018 Aerodynamic Measurement Technology and Ground Testing Conference. American Institute of Aeronautics and Astronautics , Reston, VA, Art. No. 2018-3566. ISBN 978-1-62410-561-6. https://resolver.caltech.edu/CaltechAUTHORS:20190816-105723199
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Abstract
Freestream disturbances can have a significant impact on studies of boundary layer transition in ground tests, including experiments in high-enthalpy hypersonic facilities such as an expansion tube. Freest ream noise reduction in expansion tubes can be achieved by increasing the driver-to-driven pressure ratio p₄/p₁, so we seek .methods to increase this ratio in Caltech's HET facility. Towards this end, an in-house modular parametric code has been developed using Python to explore possible modifications to the HET. The effect of increasing the pressure in a passive driver on potential noise reduction is investigated. Optimization of acceleration section length is also explored for conventional drivers. The performance of detonation drivers using H₂ and C₂H₂ fuels with He, Ar, and CO₂ diluents is examined.
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Additional Information: | © 2018 American Institute of Aeronautics and Astronautics. Published Online: 24 Jun 2018. The authors would like to thank the Office of Naval Research for supporting this work under the award N00014-16-1-2503, entitled ‘Advancing Transition Experiments in High Enthalpy Flows’. | ||||||
Group: | GALCIT | ||||||
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DOI: | 10.2514/6.2018-3566 | ||||||
Record Number: | CaltechAUTHORS:20190816-105723199 | ||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20190816-105723199 | ||||||
Official Citation: | Design of Conventional and Detonation-Driven Hypervelocity Expansion Tubes. Joel M. Lawson and Joanna M. Austin. 2018 Aerodynamic Measurement Technology and Ground Testing Conference. June. doi: 10.2514/6.2018-3566 | ||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||
ID Code: | 97950 | ||||||
Collection: | CaltechAUTHORS | ||||||
Deposited By: | Tony Diaz | ||||||
Deposited On: | 16 Aug 2019 20:14 | ||||||
Last Modified: | 16 Nov 2021 17:35 |
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