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Method for building turbulence model of S-shaped feature of low water head generator

A technology of turbulence model and construction method, which is applied in the direction of internal combustion engine testing, etc., can solve problems such as low water head no-load operation instability, failure to successfully connect to the grid, etc., achieve important engineering significance and application value, small structure size, and high sensitivity.

Inactive Publication Date: 2013-03-13
河南国网宝泉抽水蓄能有限公司
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Problems solved by technology

[0004] A pumped-storage power station in my country is a high-head power station with a water head section of 600m. During the dynamic commissioning process of unit 1, because the unit entered the anti-water pump area during the no-load grid connection process, low head no-load operation instability, The phenomenon of being unable to successfully connect to the grid has aroused widespread concern and heated discussions among domestic experts

Method used

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Embodiment 1

[0017] Embodiment 1: The hub of this power station consists of an upper reservoir, a lower reservoir, a water delivery system, an underground powerhouse, and a 500kV switch station on the ground.

[0018] The diversion tunnel in the water delivery system is arranged according to two tunnels and four machines. The distance between the centers of the two water delivery channels is 41.35m, and the hole diameter is 6.5m. The last four high-pressure steel branch pipes are about 98.79m-121.37m long.

[0019] The tailwater system is arranged as two machines in one tunnel. Two reinforced concrete bifurcated pipes are arranged at 145.757m downstream of the center line of the unit, and the four tailwater branch pipes are merged into two tailwater tunnels. The inner diameter is 8.2m.

[0020] The method for constructing the turbulence model of the "S" shape feature of the low water head generator is characterized in that it comprises the following steps:

[0021] (1) On-site testing of...

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Abstract

The invention relates to a method for building a turbulence model of an S-shaped feature of a low water head generator. The method comprises the following steps of: firstly, carrying out site test on the idle running parameter of the low water head generator of a water turbine of a unit, then, carrying out three-dimensional CFD (Computational Fluid Dynamics) computation on a fluid in the idle running process of the low water head generator and analyzing the mechanism for forming instability under such a working condition; and finally, comprehensively analyzing the running instability under the working condition according to site test and fluid computation and analysis results, and then, proposing a proposed project for solving the problem in a pumped storage power station. The idle running stability of the low water head of the water turbine of a pumped storage unit is researched by using a site test and CFD computation combination method, so that the method has important engineering significance and application values.

Description

technical field [0001] The invention relates to the field of hydraulic design of a pumped storage unit, in particular to a method for constructing a turbulence model of an "S"-shaped feature of a low-head generator. Background technique [0002] It has been nearly 140 years since the development of pumped storage units, and its technical, economic and safety roles in the entire power system have gradually been recognized by people, mainly including peak-shaving and valley-filling, frequency modulation and fast-tracking load, emergency backup, phase modulation and black boot. With the promulgation of the national "Twelfth Five-Year Plan" energy plan, renewable energy such as hydropower, nuclear power, and wind power has once again entered a golden period of rapid development. It is estimated that about 53 million kilowatts of pumped storage power stations will be put into operation in my country by 2020, and the newly installed capacity of pumped storage power stations in my...

Claims

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Application Information

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IPC IPC(8): G01M15/05
Inventor 胡清娟杨志锋李金伟刘鹏龙
Owner 河南国网宝泉抽水蓄能有限公司
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