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Numerical Simulation of Interior Flow Field of Nuclear Coolant Pump under Station Blackout Accident

Author: XuYiMing
Tutor: XuShiMing
School: Dalian University of Technology
Course: Refrigeration and Cryogenic Engineering
Keywords: Nuclear main pump Power outage Idle speed Numerical Simulation
CLC: TL334
Type: Master's thesis
Year: 2011
Downloads: 118
Quote: 3
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Abstract


With the intensification of the energy crisis , the environmental problems have become increasingly prominent nuclear power as a clean , economic and sustainable energy is an inevitable choice for China 's economic and social development . Nuclear main pump is the core of the nuclear power plant nuclear island loop system , plays a vital role in the safe operation of nuclear reactors . This article briefly describes the developments and research progress of the domestic and international nuclear main pump ; explore the computational fluid dynamics and basic overview as well as the method of analysis of the flow field in turbomachinery CFD analysis . According AP1000 nuclear design parameters of the main pump , the first in accordance with the speed of a meta - theory coefficient method designed nuclear main pump flow passage components . PRO-E , three-dimensional modeling and assembly , application FLUENT pre-processing software GAMBIT meshing FLUENT its internal flow field numerical simulation of the full flow analysis of the characteristics of nuclear main pump flow field ; nuclear main pump each performance value , the performance curve is drawn . Previous scholars on the basis of using the momentum conservation equation analysis of the nuclear main pump transient torque , the power of nuclear main pump idle speed model do a reasonable simplification , get more concise idler transfer speed model . Nuclear main pump idle speed changes according to the speed of this new model of computing, and proven , the model is fully transient analysis can be used for the idle speed changes in the nuclear main pump power outage . By calculation, gives a different variation of the moment of inertia nuclear main pump reaches half traffic idler . Change by analyzing the impeller speed external characteristic of nuclear main pump , nuclear main pump transient flow describe impeller variable speed control equation , take full account of the impact of the acceleration of mass force proposed nuclear main pump power process transient flow field analytical method . Nuclear main pump three-dimensional flow field CFD simulation power outage conditions obtained at different times after the power outage nuclear main pump pressure, static pressure , velocity vectors , flow charts , analysis of the nuclear main pump within the flow field characteristics , ultimately revealing the power off at different times of the internal flow field characteristics , provides a useful reference for the analysis of the nuclear main pump accident conditions .

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CLC: > Industrial Technology > Nuclear technology > Engineering of Nuclear Reactors > Reactor thermal hydraulics design, calculation > Reactor hydrodynamics
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