Supersonic/Hypersonic Laminar Heating Correlations for Rectangular and Impact-Induced Open and Closed Cavities

摘要

An analysis of existing baseline, zero-pressure-gradient, idealized, rectangular-geometry cavity-heating data is presented, yielding new laminar correlations for the floor-averaged heating, peak cavity endwall heating, and downstream decay rate. Correlation parameters are derived in terms of cavity geometry and local flow conditions. Prediction-limit uncertainty values are provided at the 95, 99, and 99.9% levels of significance. Nonbaseline conditions, including nonrectangular geometries and flows with known pressure gradients, are used to assess the range of applicability of the new correlations. All data variations fall within the 99% prediction-limit uncertainty bounds. Both open-flow and closed-flow cavity heating are combined into a single-curve parameterization of the heating predictions and provide a concise mathematical model of the laminar heating llowfield of stream-aligned cavities with known uncertainty.