The significance of research on high temperature flow pneumatic - valve throttle

To achieve the precision of the high temperature gaseous fuel flow control, study the forerunner servo control of high temperature flow pneumatic - valve has very important significance. The study of high temperature valve is low temperature, and can't meet the high temperature valve flow control accuracy, response speed and other technical requirements. Through the design of tubular heat flow pneumatic - valve valve mouth, get stable mass flow rate, and implement the smaller pressure loss. The heat flow pneumatic control valve adopts cone valve structure, control adopts the forerunner of servo valve control drive piston to drive the cone valve core is moving, the indirect pneumatic - valve opening size and control flow. In order to obtain high temperature flow pneumatic control valve in the actual work condition of flow control characteristic and temperature characteristic, using the method of fluid-structure interaction analysis of the valve overall thermal stress and thermal strain characteristics, compared with 45 # steel and GH783 alloy of thermodynamic properties, high temperature valve for high temperature valve material selection provides a theoretical basis. Flow field characteristics show that high temperature valve port may be through the pipe valve ammunition now smaller pressure loss under the purpose of precise control the mass flow rate; The body features of thermodynamics states that the rationality of the design of the valve meet the requirements.