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Characteristic Research of Globe Regulator Valve by Means of 3-D Simulation and Experimentation

Author: ZhaoYing
Tutor: ZhouJin；ZhangShanQun
School: National University of Defense Science and Technology
Course: Aerospace engineering
Keywords: Ball valve Flow coefficient Torque characteristics Numerical simulation
CLC: TH134
Type: Master's thesis
Year: 2007
Downloads: 88
Quote: 0
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Abstract


The ball valve according to the system requirements for the different openings to regulate the flow device is widely used in various industries . The ball valve on the performance requirements in the field of aerospace rocket engine , poor working conditions , characteristics of the ball valve flow field distribution , flow coefficient characteristics and torque characteristics of the study has been the focus of attention , to get more accurate results and save a lot of trial funding , The ball valve flow field simulation study is an effective way . Liquid rocket engines with a ball valve for example , the establishment of a three-dimensional steady-state simulation mathematical model and simulation , and then compared with the test results , verify the correctness of the calculation model . Experience in the use of engineering methods to study one-dimensional flow coefficient and torque characteristics of the ball valve , the ball valve flow coefficient and torque characteristics preliminary calculations , lay the foundation for the subsequent three-dimensional numerical comparative analysis starting from the drag coefficient k . On the basis of the basic theory of turbulence using CFD large commercial software FLUENT established three-dimensional steady-state simulation mathematical model . Constant flow conditions and variable flow conditions the flow field simulation flow coefficient μF value with the ball valve opening change curve , important parameters for the rocket engine system flow calculation and mixing ratio adjustment . Liquid Moment curve moment of maximum fluid power values ??and the role of angle for pneumatic control structure design , verification and optimization . Details of the distribution of the ball valve internal flow field obtained by calculating analyzed under different conditions the vortex distribution characteristics , the law of the pressure loss , the percentage of properties and the torque distribution characteristics , and use of this concept analysis on the impact of the ball valve characteristics , draw some conclusion has an important role in guiding the engineering design . Finally , the use of hydraulic test methods to study the flow coefficient and the torque characteristic curve of the hydraulic test program , test , measurement and control systems , and test steps , and test results to estimate the one-dimensional experience , three-dimensional simulation results were compared to verify the three-dimensional simulation the feasibility of the calculation method , the final summary of the superiority of the three-dimensional simulation .

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CLC: > Industrial Technology > Machinery and Instrument Industry > Mechanical parts and gear > Control parts
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