A simulation method for heat transfer process of cold helium cylinder deflation

A simulation method, thermal process technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as poor universality

Active Publication Date: 2016-05-04
BEIJING INST OF ASTRONAUTICAL SYST ENG +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The disadvantage of this method is that the heat transfer coefficient fitted based on known data is only applicable to specific working conditions, and the universality is poor.

Method used

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  • A simulation method for heat transfer process of cold helium cylinder deflation
  • A simulation method for heat transfer process of cold helium cylinder deflation
  • A simulation method for heat transfer process of cold helium cylinder deflation

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Embodiment Construction

[0039] Such as figure 1 As shown, the present invention provides a simulation method for the process of deflation and heat exchange of cold helium cylinders, the steps are as follows:

[0040] (1) According to the working sequence of the launch vehicle, determine the time when the cold helium cylinder is exposed to the air pillow of the storage tank and the deflation sequence of the cold helium cylinder;

[0041] (2) Establish the mathematical model of convective heat transfer inside the cold helium cylinder, the mathematical model of convective heat transfer outside and the mathematical model of heat conduction on the metal bottle wall according to the lumped parameter method;

[0042] The three models are:

[0043] The mathematical model for calculating the pressure and temperature of cold helium gas is specifically:

[0044] V · ( ...

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Abstract

Disclosed is a simulation method of a cold helium bottle venting and heat transferring process. A cold-helium-bottle inner convective heat transfer mathematical model, an outer convective heat transfer mathematical model, a metal bottle wall heat conduct mathematical model and a cold helium pressure and temperature calculate mathematical module are established by the lumped parameter method through establishing a helium bottle solid wall heat capacity unit, a simulated module is established in system simulating software, influences on helium temperature in the helium bottle by medium convection, metal wall heat capacity and heat conduction are considered, and simulation accuracy of temperature changes in the filling and venting process of a cold helium bottle is improved.

Description

technical field [0001] The invention relates to a simulation method for the deflation and heat exchange process of a cold helium cylinder, which is suitable for performance analysis of the cold helium cylinder in a cold helium pressurization system of a low-temperature power launch vehicle during ground tests and flight work. Background technique [0002] In the cold helium pressurization system of cryogenic power launch vehicle, the cold helium cylinder is soaked in liquid hydrogen propellant (20K). During the working process on the arrow, as the gas cylinder is deflated, the temperature of the cold helium cylinder will drop first, and then due to the outflow of propellant and the drop of the liquid hydrogen level, the cold helium cylinder will be exposed to the liquid surface and exposed to the air pillow. The temperature of the pillow is significantly higher than that of liquid hydrogen, which causes the temperature of the cold helium cylinder to rise later. [0003] The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
Inventor 叶超陈二锋王海洲丁建春薛立鹏冉振华江海峰
Owner BEIJING INST OF ASTRONAUTICAL SYST ENG
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