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- Article name
- Estimate of variance of coefficients of disturbance aerodynamic pitching and yawing moments of a rotary body with small random surface distortions of a 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
MOKIN Yu. A., , ofpat@mail.ru; src@makeyev.ru, South Urals Federal Research Centre of Mineralogy and Geoecology of the UB RAS, Miass, Chelyabinsk Region, Russia
KALASHNIKOV S. T., , ofpat@mail.ru; src@makeyev.ru, South Urals Federal Research Centre of Mineralogy and Geoecology of the UB RAS, Miass, Chelyabinsk Region, Russia
- Keywords
- rotary body / sharp cone / composite thermal protection material / supersonic flow / small random surface distortion / small attack angle / coefficients of disturbance aerodynamic pitching and yawing moments
- Year
- 2021 Issue 3 Pages 7 - 13
- Code EDN
- Code DOI
- 10.52190/2073-2562_2021_3_7
- Abstract
- The article is devoted to one of acute issues of the definition of aerodynamic characteristics of high-speed re-entry vehicles (RVs) of the rotary-body shape with small random surface distortions of a composite thermal protection coating, i. e. an issue of the assessment of a scale of variance of coefficients of disturbance aerodynamic pitching D{mz0} and yawing D{my0}, moments at zero attack angle 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 the coefficients yawing my0 and pitching mz0 at 3s{my0} versus a degree of correlation dependence for modeled autocorrelated functions of random surface distortions of a sharp 30°-half-angle cone flown around at are provided. The obtained curves are qualitatively analyzed.
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