Mathematical modeling of non-stationary thermal regimes of the pressure measurement system block SID-3-148

Abstract

A description of the methodology and the results of modeling the non-stationary thermal regimes of the operation of radio-electronic elements of the SID-3-148 block, installed in the under-hood space of the D-436-148 engine, is presented. The modeling was carried out based on thermometric data obtained during the certification tests of the An-148 aircraft. The analytical tool used was the method of finite balances (a modification of the grid method). The problem was reduced to a system of ordinary nonlinear inhomogeneous differential equations, solved in matrix form.