TY JOUR TI ABOUT THE UNSTEADINESS OF PROPELLANT COMBUSTION AT HIGH-PRESSURE AREA KW propellant KW unsteady combustion KW variable pressure KW порох KW нестационарное горение KW переменное давление JO Herald of Technological University AU Aleksandrov, V.N. AU Dinovetsky, B.D. AU Kostochko, A.V. PY 2025 IS 16 PB Kazan National Research Technological University