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- Article name
- Estimate of variance of disturbance aerodynamic normal force coefficient of rotary body with small irregular surface distortions of composite thermal protection coating at supersonic flow
- 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
- supersonic flow / rotary body / sharp cone / composite thermal protection material / small random surface distortion / small attack angle / aerodynamic normal force coefficient
- Year
- 2020 Issue 3 Pages 3 - 8
- Code EDN
- Code DOI
- Abstract
- The article is devoted to one of acute issues of definition of aerodynamic characteristics of high-speed re-entry vehicles (RVs) of the rotary-body shape with small irregular surface distortions of a composite thermal protection coating, i. e. an issue of assessment of a scale of variance of aerodynamic disturbance normal force coefficients at zero attack angle D{cy0}, D{cz0} versus governing parameters. An analytical integral solution of a set modeled problem for a rotary body with a given autocorrelated function of irregular distortions of its surface is obtained on the basis of Fourier expansion of the surface distortion and a method of differential locality hypothesis used to evaluate pressure variations. Curves of practically ultimate values cy0, cz0 at 3s{cy0}, versus a degree of correlation dependence for modeled autocorrelated functions of irregular surface distortions of a sharp 45о-cone flown around at M¥ @ 10 are provided. The obtained curves are qualitatively analyzed.
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