Modeling method of general centrifugal pump dynamic simulation model based on Modelica language
A technology of dynamic simulation model and modeling method, which is applied in design optimization/simulation, CAD numerical modeling, special data processing application, etc. Effects of Dynamic Characteristics Simulation Requirements
Pending Publication Date: 2022-02-08
XIAN AEROSPACE PROPULSION INST
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Problems solved by technology
[0003] The purpose of the present invention is to solve the technical problem that the existing centrifugal pump simulation model cannot carry out the simulation of the dynamic characteristics of a large-scale rocket engine, and to provide a modeling method for a general centrifugal pump dynamic simulation model based on Modelica language
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[0026] The present invention will be further described below in conjunction with embodiment.
[0027] A modeling method of a general centrifugal pump dynamic simulation model based on Modelica language, comprising the following steps:
[0028] 1) The dynamic model of the centrifugal pump is packaged in the centrifugal pump component module by adopting a modular modeling method. The pump in the following text is the abbreviation of the centrifugal pump, and data is transmitted between different centrifugal pump component modules through interfaces; for example figure 1 As shown, the centrifugal pump assembly module includes four interfaces, namely port_a fluid inlet, port_b fluid outlet, flange_a mechanical inlet, flange_b mechanical outlet; wherein, the interface variables transmitted by port_a fluid inlet and port_b fluid outlet are pressure p and flow m_flow; the interface variables transmitted by the mechanical inlet of flange_a and the mechanical outlet of flange_b are the...
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The invention relates to a modeling method of a general centrifugal pump dynamic simulation model based on a Modelica language, and aims to solve the technical problem that an existing centrifugal pump simulation model cannot perform large-scale rocket engine dynamic characteristic simulation. According to the model, a modular modeling mode is adopted, a centrifugal pump dynamic model is packaged in centrifugal pump assembly modules, data are transmitted among the different centrifugal pump assembly modules through interfaces, pump rated design parameters are utilized in the scheme argumentation stage, and dynamic characteristics are fitted through a theoretical formula; static characteristic curves of pump lift characteristics and power characteristics are obtained through a centrifugal pump hydraulic test, a pump full-dynamic characteristic model is established, static characteristic curves of pump lift characteristics and efficiency characteristics are obtained through the centrifugal pump hydraulic test, and the pump full-dynamic characteristic model is established; aiming at the condition that the efficiency characteristic of the secondary pump cannot be independently obtained, the pump lift characteristic is obtained through a centrifugal pump hydraulic test, and the rated design efficiency is given, so that a pump full-dynamic characteristic model is established.
Description
technical field [0001] The invention relates to liquid rocket engine system simulation, and mainly relates to a dynamic simulation model, specifically a modeling method of a general centrifugal pump dynamic simulation model based on Modelica language, which is suitable for liquid rocket engine dynamic characteristic simulation. Background technique [0002] In the pump-pressed liquid rocket engine, there are oxidant pre-pressure pump and oxidant pump in the oxidizer circuit, and there are fuel pre-pressure pump, fuel primary pump and fuel secondary pump in the fuel circuit. They are all centrifugal pumps, and their main function is to Propellant pressurization. The main parameters describing the characteristics of centrifugal pumps include flow, head, speed, power and efficiency. In engineering, the head, power and efficiency characteristics of the pump are generally determined by the test method, and the obtained is actually the static characteristic curve of the pump, whi...
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Login to View More IPC IPC(8): G06F30/15G06F30/17G06F30/28G06F111/10G06F113/08G06F119/14
CPCG06F30/15G06F30/17G06F30/28G06F2113/08G06F2119/14G06F2111/10
Inventor 王丹陈宏玉刘占一任孝文周晨初张睿文李舒欣
Owner XIAN AEROSPACE PROPULSION INST