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Local Heat-Transfer Coefficients in a Nozzle with High-Speed Laminar Flow

Report Number: AEDC TDR 64-61
Author: Carden, William H.
Corporate Author: ARO, Inc.
Date of Publication: 1964-04
Pages: 34
Contract: AF 40(600)-1000
Project: 8950
Task: 895004
AD Number: AD0434369

An experimental investigation of the local heattransfer coefficient in the throat region of a nozzle operating under conditions of cold wall, thick laminar boundary-layer, low-density, highspeed flow has been conducted. The experimental results have been compared with several analytic procedures for predicting the heat-transfer coefficient in laminar flow. The simple flat plate equation is shown to underestimate the heat-transfer coefficient, while the method of Cohen and Reshotko predicts coefficients which are too large. The incremental flat plate method of Pasqua and Stevens and a modification of a solution of Beckwith and Cohen exhibit good results downstream of the nozzle throat when reference to the value calculated by the simple flat plate equation at the nozzle exit. The effects of thermal raiation upstream of the nozzle throat are indicated.

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