Abstract
A novel method of heating wind tunnel flows to strong thermal stratifications is described. Variable electric heating is employed to create user-selectable temperature profiles in steady, uniform mean flow. Linear temperature gradients of up to 200 °C/m (Vaisala frequencies of 2.5 rad s−1) can be sustained. The performance of the facility is discussed in the context of continuously-stratified grid-generated turbulence, although it is useful for a broader set of applications. The flow field is found to be free of deleterious natural convection and internal wave effects. The departure from homogeneity of grid-generated, stratified turbulence in the facility is roughly ± 10% away from the wall influenced regions.
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