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A drainage cone drilling method based on the three-dimensional simulation method of the full flow field of a hydraulic turbine

A simulation method, the technology of the discharge cone, applied in mechanical equipment, hydroelectric power generation, engine components, etc., can solve problems such as unsteady flow and pressure pulsation of hydraulic turbine units

Active Publication Date: 2019-03-15
虚拟现实数字技术研究院(哈尔滨)有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages and deficiencies of the prior art, provide a method for drilling holes in the discharge cone based on the three-dimensional simulation method of the full flow field of the hydraulic turbine, and solve the unsteady flow problem inside the hydraulic turbine unit, especially the vortex zone in the draft tube And the corresponding pressure pulsation problem

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  • A drainage cone drilling method based on the three-dimensional simulation method of the full flow field of a hydraulic turbine
  • A drainage cone drilling method based on the three-dimensional simulation method of the full flow field of a hydraulic turbine
  • A drainage cone drilling method based on the three-dimensional simulation method of the full flow field of a hydraulic turbine

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[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0042] The present invention provides a method for punching water discharge cones based on a three-dimensional simulation method for the full flow field of a hydraulic turbine.

[0043] Step 1. Establish a model testing experimental system, design different discharge cone drilling models for matching processing, improve the hydraulic test bench according to different configurations of discharge cones, and perform high-speed photogrammetry to obtain ...

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Abstract

The invention provides a punching method for a runner cone based on a three-dimensional simulation method for a whole flow field of a water turbine. The punching method comprises the steps of establishing a model test experiment system; selecting a turbulence model and performing three-dimensional unsteady simulation for the whole flow field of the water turbine by using a RANS simulation method, wherein the calculation of the three-dimensional simulation method for the whole flow field of the water turbine comprises geometric modeling, grid setting , a numerical value method, a governing equation and a boundary condition setting; and synthesizing model experiment and numerical simulation data and testing different runner cone punching models under different flow deviation working conditions. The punching method solves the problem of unsteady flow in a water turbine set in the prior art, and especially the problems of a vortex strip in a draft tube and corresponding pressure pulsation.

Description

technical field [0001] The invention belongs to the technical field of water turbine stability, and in particular relates to a method for punching holes in a discharge cone based on a three-dimensional simulation method of the full flow field of a water turbine. Background technique [0002] Today, as the importance of hydropower generation becomes increasingly prominent, the requirements for improving the operating efficiency of hydropower stations and the stability of hydraulic turbines have become particularly prominent. Among the factors affecting the stable operation of the turbine, the hydraulic factor is the most prominent, including the dynamic and static interference between the rotating part and the stationary part, the shedding of the blade surface, the cavitation blade path vortex, and the cavitation draft tube vortex belt, etc. During the operation of the turbine, most of these flow phenomena occur in off-the-shelf conditions that deviate from the design conditi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03B11/00G06F17/50
CPCF03B11/00F03B11/008G06F30/17G06F30/23Y02E10/20
Inventor 李小斌李凤臣赵越刘登峰赵昊阳周增昊
Owner 虚拟现实数字技术研究院(哈尔滨)有限公司
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