THE EQUILIBRIUM TEMPERATURE PROBE. A DEVICE FOR MEASURING TEMPERATURES IN HYPERSONIC BOUNDARY LAYERS
- 4 December 1961
- report
- Published by Defense Technical Information Center (DTIC)
Abstract
The equilibrium temperature probe is a device which may be used to determine the flow temperature in a hypersonic boundary layer. It consists of a sharp, small angled cone of low emissivity metal supported by a thermal insulator. A thermocouple is installed to measure the cone temperature. The cone is held with its axis parallel to the flow. Ideally, the indicated temperature is the adiabatic wall temperature, a property of the flow which when combined with other more easily obtained properties and established relationships provides sufficient information to determine the total temperature of the flow. The equilibrium temperature probe can be made very small without excessive conduction and radiation effects. This is the main advantage obtained from using the equilibrium temperature probe over the conventional totaltemperature probe. In addition, the conical configuration minimizes the probe's interference with the flow.Keywords
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