V. G. Degtyar, S. T. Kalashnikov, G. F. Kostin, E. N. Fedorova, V. I. Khlybov, “Predicting laminar-turbulent transition movement on the side surfaces of re-entry vehicles”, Prikl. Mekh. Tekh. Fiz., 2025, Volume 66, Issue 5,Pages <nobr>83

Predicting laminar-turbulent transition movement on the side surfaces of re-entry vehicles

V. G. Degtyar^a, S. T. Kalashnikov^b, G. F. Kostin^b, E. N. Fedorova^a, V. I. Khlybov^ab

^a Academician V. P. Makeyev State Rocket Centre
^b South Urals Federal Research Center of Mineralogy and Geoecology of the Urals Branch of the Russian Academy of Sciences

Abstract: This paper presents a method for predicting the movement of the laminar-turbulent transition front on the side surfaces of spherically blunted circular cones with account for surface roughness effects. The study demonstrates that mass ablation of the composite thermal protection systems on re-entry vehicles induces surface roughness along the flight trajectory. This roughness arises from differential ablation rates between the constituents of the material, such as fillers and binders, reinforcing frame elements, and the carbon matrix.

Keywords: re-entry vehicle, surface roughness, laminar-turbulent transition.

UDC: 532.526.3:629.7.015

Received: 12.05.2025
Revised: 20.05.2025
Accepted: 02.06.2025

DOI: 10.15372/PMTF202515656