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Ablation Modeling for Dynamic Simulation of Reentry Vehicles

其他書名	Preprint
出版	Air Vehicles Directorte, Air Force Research Laboratory, Air Force Materiel Command, 2006
URL	http://books.google.com.hk/books?id=LfnOnLBkHAwC&hl=&source=gbs_api

註釋The collection of methods described in this manuscript can be used in a dynamic simulation to provide estimates of the mass properties and aerodynamic forces and moments as a reentry vehicle ablates due to aerodynamic heating. Vehicles that experience relatively low peak heating with reusable thermal protection systems such as the shuttle, experience little if any ablation. At the other extreme, ballistic reentry vehicles and interplanetary probes can experience very high peak heat loads that cause the thermal protection material to ablate. A number of vehicle characteristics change as a result of ablation. The mass properties of the vehicle change due to the loss of material and the aerodynamic forces and moments acting on the vehicle change as a result of the an ablating outer mold line (OML). These changes can affect aerodynamic as well as guidance and control system performance. Empirical methods are described in this paper that can be used to translate limited test data into a rough, but representative model that can be used to estimate the effects of ablation on a vehicle's ability to follow a prescribed trajectory and on guidance and control performance and robustness.