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A simplified form of the AHD transition criterion, which was originally derived on the basis of linear stability theory and self-similar Falkner-Skan flow, is assessed on its prediction accuracy for non-self-similar flows. Comparing the results of the transition criterion in form of N-factor envelopes with calculations from linear stability theory, a modification of the transition criterion is needed to account for local blowing or suction and local deceleration or acceleration of the flow.

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Assessment and Adaptation of Transition Criteria for Non-Self-Similar Flows

  • 会议论文

  • 发表日期：

    2026年

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  • Normann Krimmelbein,
  • Sebastian Helm,
  • Andreas Krumbein

摘要

A simplified form of the AHD transition criterion, which was originally derived on the basis of linear stability theory and self-similar Falkner-Skan flow, is assessed on its prediction accuracy for non-self-similar flows. Comparing the results of the transition criterion in form of N-factor envelopes with calculations from linear stability theory, a modification of the transition criterion is needed to account for local blowing or suction and local deceleration or acceleration of the flow.