CALCULATION OF THE COMBUSTION CHAMBER FOR A DUAL-FUEL HEATING BOILER OF MOBILE ROCKET COMPLEXES

Abstract

Mobile missile systems require specialized heating systems that create stable conditions for calculations, launch preparations, and technical maintenance. The heating boilers used in these systems provide the necessary temperature conditions for computing equipment and personnel. To ensure the uninterrupted operation of such a heating system, it is advisable to make it multi-fuel. The paper proposes a method for calculating the combustion chamber and burners of a dual-fuel boiler intended for use as part of the auxiliary equipment of mobile missile systems. The choice of a combination of natural gas and diesel fuel is due to their availability and the absence of solid combustion products, which reduces the need for equipment maintenance. An algorithm for determining the amount of air required for complete combustion of fuel mixtures is presented, and the basic conditions for their ignition and stable combustion are considered. The design features of the most common gas and liquid fuel burners used in low-power water boilers are described, and formulas are given for calculating their geometric characteristics depending on pressure, fuel consumption per second, and the amount of air for combustion. A method for determining the volume of the furnace through heat release during combustion is presented, which allows establishing input data for further system design. For example, a calculation was performed for a 29 kW boiler, determining its volume, natural gas and diesel fuel consumption, as well as the relative oxygen consumption for complete combustion. The dimensions of the burner outlet channels, which ensure effective mixing of fuel with air, were analyzed separately. The results obtained demonstrate the possibility of creating a compact heat supply system that can be integrated into mobile missile complexes at the initial stages of their development and ensure the reliability of the calculation and launch subsystems in difficult operating conditions.