No abstract

The article conducted a modeling number of the working process in the flame tube of the main chamber of combustion of the turbojet engine of tactical aviation aircraft. The geometric model of the flame tube has been created and adapted for carrying out the interconnecting calculation of heat and stress-strain stations of the walls of the flame tube under the influence of operating factors at the numerical modeling of the working process. Quantitative-qualitative analysis of modeling results was carried out and the connection between peculiarities of working process flow and characteristic damage of the flame tubes discovered in operation was established. The possibility of using modern CAD/CAE systems to solve scientific tasks to ensure maximum use of resource opportunities of the main and especially responsible parts of turbojet engune on the basis of the assessment of their damage. The obtained results of work process numerical calculations, thermal state and VAT of the heat pipes walls of the main combustion chamber refuse: identify critical areas and perform optimal construction; the decision to establish or extend the heat pipes resource is substantiated based on the assessment of the degree of depletion of harmfulness in conditions where the developer and manufacturer do not fulfill their obligations in terms of author support; to provide recommendations to aircraft repair companies regarding the finalization of aircraft structures during the implementation of the overhaul, avoiding long-term experiments to determine their ultimate state.

The armed aggression of the russian federation showed that the number of military formations does not give advantages on the battlefield. Thanks to skillful leadership and modern weapons, which include guided air bomb, it is possible to gain an advantage on a specific section of the front. Recently, the modern world trends are to increase the accuracy of ammunition damage. The effectiveness of guided air bomb damage in comparison with conventional air bombs is beyond doubt. The method of forming regions of permitted dropping conditions of guided aerial bombs of modular design is a procedure for finding sets of vertices of the area of permitted dropping conditions. Its essence consists in selecting a subset of points with extreme properties from a set of some points in the space of phase states of the bomb. This procedure is iterative, convenient to implement, and the use of well-researched methods of linear programming allows to ensure computational stability of the procedure in the entire range of possible conditions of combat use of bombs. The problem of optimal control is reduced to a boundary value problem – to find a solution to a system of equations whose phase coordinates satisfy the initial conditions and boundary conditions. In addition, according to the principle of the maximum, the Hamiltons function under optimal control should reach a maximum. Based on the results of research, it was established, that: function H reaches its maximum at the obtained control values; from the position obtained as a result of the solution of the minimax filtering algorithm with correction from the satellite navigation system, the hypothetical problem of optimal launch of the guided air bomb in the final control area is solved; a transition to a new position is made with the control obtained by solving the problem of optimal launch into the final control area; in the new position, the parameters of the guided air bomb own movement are monitored and filtered; the solution of the problem continues until the end of control of the guided air bomb.