Supercritical fuel oil heating device in supercritical oil bath type

Abstract

The invention discloses a supercritical fuel oil heating device in a supercritical oil bath type. With supercritical oil bath heating and flowing heat exchange in a spiral pipe as a basis, a sleeve type structure is adopted, and supercritical fluid in different temperatures and pressures can be continuously and stably provided for a supercritical jet test of fluid effectively. By means of the supercritical oil bath heating, generation of a coking and cracking reaction in the fuel oil heating process can be effectively avoided, and generation of impurities is inhibited. The spiral pipe is used as a flowing path, and the heat flux and the heat exchange efficiency can be effectively improved, so that the problem that the heating temperature of an existing heater is not uniform can be solved. Two stages of heating manners are integrated, and the heat preserving performance and the heat efficiency of the device are improved. Due to the gas circuit design, zero pressure difference among the spiral pipe, a pre-heating cavity and an oil bath cavity is achieved, the weight and the cost of the device are reduced, and the heat exchange capacity is also improved. The supercritical fuel oil heating device in the supercritical oil bath type is compact in structure and convenient to use, meanwhile, the supercritical fuel oil heating device in the supercritical oil bath type is also applicable to subcritical, transcritical and supercritical tests of gas, liquid and various fluid, and has quite high adaptability.

Description

technical field [0001] The invention belongs to the research field of supercritical jet combustion in future high-performance aerospace power systems, and mainly relates to a supercritical oil bath type supercritical fuel heating device suitable for supercritical fluid experimental research. Background technique [0002] With the development of high-performance military aircraft in the future, it is required that the aero-engine has a higher boost ratio and a higher temperature before the turbine. The higher boost ratio makes the fuel injection pressure and ambient pressure in the engine combustion chamber exceed the critical pressure of aviation fuel. The higher temperature before the turbine requires the aircraft to use its own aviation fuel as the cooling medium. Different engine operating conditions make the temperature of the aviation fuel reach the supercritical temperature before entering the combustion chamber. It can be seen that in the future aero-engine combustor...

AI Technical Summary

Problems solved by technology

In view of the above problems, in order to obtain continuous supercritical fuel oil with controllable temperature and pressure during the experiment, a new supercritical fuel heating device must be designed to solve the problems of impurities in the fuel, uneven temperature of the fuel and large heat dissipation during the heating process. And other issues

Images