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<p>The authors have presented the procedure of analysis and statistical processing of results of a heat-engineering aerodynamic experiment. Structural features of the aerodynamic model in the form of a cone with surface mass-transfer effects have been described. A scheme to conduct the heat-engineering aerodynamic experiment with the special supply of mass has been given. In designing the experiment, it was assumed that all the regression-analysis assumptions agreed previously are legitimate and the coefficients of the initial mathematical model will be assessed by the method of experimental-design theory. With the correlation analysis, the authors have confirmed the influence of surface mass transfer and of the destructible coating on the parameters of the boundary layer of the model in flow. In the correlation analysis, the conditions of turbulent transitions were studied and measured. The heat-flux distribution has been presented by a table in which Reynolds numbers are indicated. An analysis of the pairwise action of the gasdynamic parameters of the boundary layer on the transition of Reynolds numbers has been made. The number of the degrees of freedom is calculated according to the general rule: the number of the degrees of freedom is equal to the number of all the indices from which the variance is computed, that is decreased by the number of relations that link them.</p>

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Analysis of Experimental Research into Studying the Transition of Flow in the Boundary Layer on Sublimating Cones at Supersonic Velocities with the Use of Composite Designs

  • 期刊论文

  • 发表日期：

    2026年3月1日

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  • N. I. Sidnyaev,
  • E. Battulga

摘要

The authors have presented the procedure of analysis and statistical processing of results of a heat-engineering aerodynamic experiment. Structural features of the aerodynamic model in the form of a cone with surface mass-transfer effects have been described. A scheme to conduct the heat-engineering aerodynamic experiment with the special supply of mass has been given. In designing the experiment, it was assumed that all the regression-analysis assumptions agreed previously are legitimate and the coefficients of the initial mathematical model will be assessed by the method of experimental-design theory. With the correlation analysis, the authors have confirmed the influence of surface mass transfer and of the destructible coating on the parameters of the boundary layer of the model in flow. In the correlation analysis, the conditions of turbulent transitions were studied and measured. The heat-flux distribution has been presented by a table in which Reynolds numbers are indicated. An analysis of the pairwise action of the gasdynamic parameters of the boundary layer on the transition of Reynolds numbers has been made. The number of the degrees of freedom is calculated according to the general rule: the number of the degrees of freedom is equal to the number of all the indices from which the variance is computed, that is decreased by the number of relations that link them.