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- Article name
- Estimate of variance of aerodynamic rolling moment coefficient of sharp cone caused by small random surface distortions of composite coating under supersonic flow at small angle of attack
- Authors
- KALASHNIKOV S. T., , src@makeyev.ru, Department of Fundamental Aerospace Technologies Problems of the Chelyabinsk Research Centre of the RAS Urals Branch, Miass, Chelyabinskaya oblast, Russia
SHVALEVA R. K., , src@makeyev.ru, Joint Stock Company "Academician V. P. Makeyev State Rocket Center"; South Ural Scientific Centre, Miass, Chelyabinsk Region, Russia
MOKIN Yu. A., , src@makeyev.ru, Joint Stock Company "Academician V. P. Makeyev State Rocket Centre"; South Ural Scientific Centre; Federal State Autonomous Educational Institution of Higher Education "SUSU" (National Research University), Miass, Chelyabinsk Region, Russia; Chelyabinsk, Russia
- Keywords
- rotary body / sharp cone / composite thermal protection material / supersonic flow / small random surface distortion / small attack angle / dynamic rolling moment coefficient
- Year
- 2019 Issue 4 Pages 3 - 7
- Code EDN
- Code DOI
- Abstract
- One of acute issues of definition of aerodynamic coefficients of re-entry vehicles (RVs) of conic shape with small random surface distortions of a composite thermal protection coating is under consideration, i. e. an issue of assessment of a scale of variance D(mx) of disturbing aerodynamic rolling moment coefficient mx versus governing parameters. An analytical integral solution of a set modeled problem for a sharp cone with a given modeled stationary autocorrelated function of random distortions of its surface is obtained on the basis of a method of differential locality hypothesis used to evaluate pressure variations. The obtained solution is qualitatively analyzed. It is shown that the variance of coefficient mx with the 4th order of vanishing against an amplitude of the surface distortions is dependent on values of several more parameters. A curve of practically ultimate values of mx at 3s(mx) versus a degree of correlation dependence of random surface distortions of a 10o-cone is provided.
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