High pressure spray characteristics test system under high temperature and high back pressure

Abstract

The invention discloses a high-pressure spray characteristic testing system under high temperature and high back pressure. The test system consists of constant volume combustion chamber, heating system, ignition and fuel injection system, synchronous control system, transient high temperature and high pressure measurement system and high-speed photography system. Before the test, the constant volume combustion chamber is heated to the target temperature by the heating system, the fuel and air are mixed, and the mixed gas is pre-combusted to establish high temperature and high back pressure conditions. In a high temperature and high back pressure environment, the fuel injection system injects diesel into the constant volume combustion chamber, the temperature and pressure sensors record relevant data, and the high-speed photography system takes pictures of the spray form and completely records the spray characteristic data. The test system of the present invention can detect the spray characteristics in the real engine environment. The fuel is first injected into the constant volume combustion chamber, and the fuel is burned in the constant volume combustion chamber to increase the temperature and pressure in the constant volume combustion chamber. The test environment is a high temperature and high back pressure environment, which is consistent with the environment in the actual engine.

Description

technical field [0001] The invention relates to the field of diesel spray characteristic testing, in particular to a high-pressure spray characteristic testing system under high temperature and high back pressure. [0002] technical background [0003] Diesel engine, as an internal combustion engine with high thermal efficiency, is widely used in the fields of vehicles, agriculture and ship power. A large amount of NO is emitted during the combustion process of a diesel engine x and particulate pollution. With the improvement of emission regulations, the emission of pollutants must be strictly controlled, so it is very important to optimize the combustion process and improve the emission of diesel engines. During the combustion process of a diesel engine, the spray atomization of fuel directly affects the formation of fuel-air mixture, which in turn affects the quality of combustion, and ultimately affects the economic efficiency, power and emissions of the engine. Most of...

AI Technical Summary

Problems solved by technology

Most of the test systems for spray atomization focus on testing under normal temperature and pressure or high back pressure, which is inconsistent with the actual conditions of spray in diesel engines. Therefore, it is necessary to study the high-pressure spray characteristics test system under high temperature and high back pressure necessary

Images