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Research on Streamlines and Aerodynamic Heating for Unstructured Grids on High-Speed VehiclesEngineering codes are needed which can calculate convective heating rates accurately and expeditiously on the surfaces of high-speed vehicles. One code which has proven to meet these needs is the Langley Approximate Three-Dimensional Convective Heating (LATCH) code. It uses the axisymmetric analogue in an integral boundary-layer method to calculate laminar and turbulent heating rates along inviscid surface streamlines. It requires the solution of the inviscid flow field to provide the surface properties needed to calculate the streamlines and streamline metrics. The LATCH code has been used with inviscid codes which calculated the flow field on structured grids, Several more recent inviscid codes calculate flow field properties on unstructured grids. The present research develops a method to calculate inviscid surface streamlines, the streamline metrics, and heating rates using the properties calculated from inviscid flow fields on unstructured grids. Mr. Chris Riley, prior to his departure from NASA LaRC, developed a preliminary code in the C language, called "UNLATCH", to accomplish these goals. No publication was made on his research. The present research extends and improves on the code developed by Riley. Particular attention is devoted to the stagnation region, and the method is intended for programming in the FORTRAN 90 language.
Document ID
20010079115
Acquisition Source
Langley Research Center
Document Type
Other
Authors
DeJarnette, Fred R. (North Carolina State Univ. Raleigh, NC United States)
Hamilton, H. Harris
Date Acquired
September 7, 2013
Publication Date
August 21, 2001
Subject Category
Aerodynamics
Funding Number(s)
CONTRACT_GRANT: NCC1-407
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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