METHOD OF DEFINING LIMITS OF RESISTANCE TO TRANSVERSES HIGH-FREQUENCY PRESSURE OSCILLATIONS IN MODEL LIQUID-PROPELLANT ROCKET ENGINE COMBUSTION CHAMBER WITH NATURAL TWO-COMPONENT INJECTOR AT BAROMETRIC PRESSURE, AND UNIT TO THIS END Russian patent published in 2012 - IPC F02K9/96 G01M15/14 

FIELD: machine building.

SUBSTANCE: invention relates to rocketry and may b used in development and production of liquid-propellant rocket engines. Determination of said boundaries is performed with air or inert gas jets effusing from two-component injector that allow reproducing features of fuel component mixing with preserved primary approach to procedure. To implement proposed method, model combustion chamber with natural two component injector is used comprising horizontal bed to support detachable combustion chamber made up of cylindrical shell with natural two-component injector connected with fuel components feed sources, metres of temperature, pressure and fuel components flow rate as well as combustion chamber pressure pulsation metres. In compliance with this invention, axes of model combustion chamber and injector are aligned. Note here that combustion zone gas-dynamic simulator, a honeycomb, is arranged inside model combustion chamber, opposite the injector and aligned therewith. Said simulator is made up of a unit of densely packed thin-wall 2-3 mm-dia tubes to ensure set geometrical permeability of 0.71-0.77. Length of sad tubes is selected to provide for absence of resonance of intrinsic frequencies of transverse tangential oscillations in model combustion chamber with intrinsic frequencies of lengthwise oscillations in honeycomb tubes. Note also that simulator diameter is selected to cover expanding two-component fuel jet by set bottom end face. Note also that model combustion chamber length and diameter are selected to make intrinsic acoustic frequencies in model and natural combustion chamber equal while air or inert gases are used as fuel.

EFFECT: simplified procedure, simplified maintenance and operation.

4 cl, 3 dwg