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Dynamics and Control of Shock Motion in a Near-Isentropic Inlet

MacMartin, Douglas G. (2004) Dynamics and Control of Shock Motion in a Near-Isentropic Inlet. Journal of Aircraft, 41 (4). pp. 846-853. ISSN 0021-8669. doi:10.2514/1.416.

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Inlet pressure recovery of supersonic aircraft could be improved using a near-isentropic inlet with only a weak normal shock aft of the throat; however, such an inlet is highly susceptible to unstart. Small perturbations can move the shock ahead of the throat, where it is unstable. The dynamics of the inlet and shock are analyzed using a low-order model that captures both the nonlinear shock motion and inlet acoustic propagation. This model allows parametric exploration of both the potential and limitations of using control to stabilize actively the shock, including actuator authority as a function of location, actuator authority, and bandwidth requirements, and sensor requirements. A simple control law is shown to be sufficient to stabilize the shock motion.

Item Type:Article
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MacMartin, Douglas G.0000-0003-1987-9417
Additional Information:© 2003 AIAA. Received 4 January 2003; revision received 30 April 2003; accepted for publication 1 May 2003. A one-dimensional Euler code provided by James Paduano and Ali Merchant at the Massachusetts Institute of Technology was invaluable in validating the low-order model derived herein. Timothy Colonius at the California Institute of Technology assisted with the model development.
Issue or Number:4
Record Number:CaltechAUTHORS:20170408-143959692
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Official Citation:Douglas G. MacMartin. "Dynamics and Control of Shock Motion in a Near-Isentropic Inlet", Journal of Aircraft, Vol. 41, No. 4 (2004), pp. 846-853.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:75987
Deposited By: 1Science Import
Deposited On:26 Apr 2017 23:18
Last Modified:15 Nov 2021 16:56

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