Some Problems of Measuring Laminar-Turbulent Transition in Short-Duration Wind Tunnels

摘要

Investigation of the transition is one of the key experiments in wind tunnels. Different methods of the transition definition can lead to different result (see for example [1]). But even one method can give different results in short-duration or shock wind tunnels. In experiments on the study of the transition on the cone in the short-duration wind tunnel "Tranzit-M", the hysteresis of the transition position was detected. In this regard, a study of the behavior of the transition position under the conditions of varying parameters of the wind tunnel was conducted. This question is also extremely important for choosing the time window, in which the flow parameters can be considered as quasi-stationary.