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- Article name
- Estimate of variance of an aerodynamic drag coefficient of a rotary body with small random surface distortions of composite thermal protection coating at supersonic flow
- Authors
- SHVALEVA R. K., , src@makeyev.ru, Joint Stock Company "Academician V. P. Makeyev State Rocket Center"; South Ural Scientific Centre, Miass, Chelyabinsk Region, Russia
KALASHNIKOV S. T., , ofpat@mail.ru, South Urals Federal Research Center of Mineralogy and Geoecology UB of the RAS, Miass, Chelyabinsk Region, Russia
MOKIN Yu. A., , ofpat@mail.ru, South Urals Federal Research Centre of Mineralogy and Geoecology of the UB RAS, Miass, Chelyabinsk Region, Russia
- Keywords
- supersonic flow / rotary body / sharp cone / composite thermal protection material / small random surface distortion / small attack angle / variance of an aerodynamic drag coefficient
- Year
- 2022 Issue 1 Pages 5 - 10
- Code EDN
- Code DOI
- 10.52190/2073-2562_2022_1_5
- Abstract
- The article is devoted to one of acute issues of definition of aerodynamic characteristics of high-speed re-entry vehicles (RV) of the rotary-body shape with small random surface distortions of composite thermal protection coating, i. e. an issue of assessment of a scale of the aerodynamic drag coefficient variance D{cx} at small attack angles versus governing parameters. An analytical integral solution of the set problem for a rotary body with a given 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 and expansion of the surface distortion into a Fourier series. Curves of practically ultimate values of variance of the coefficient cx at 3s{cx} versus a degree of correlation dependence for three modeled autocorrelated functions of random surface distortions of a sharp 30o-half angle cone flown around at M¥ @ 10 are provided. The obtained curves are qualitatively analyzed.
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