海上风电换流站温排水三维数值模拟

在海洋风电换流平台中,冷却水的排放会给海洋环境的速度场和温度场造成很大的影响,并直接影响海洋生物的生存。通过建立海洋平台冷却水排放三维模型,利用FLUENT中的标准k-?湍流模型计算速度场和温度场,探讨了环境流速、热射流流速、热射流入射角等因素对温度场的影响规律。研究结果表明：随着温水排放流速的增加,存在一个最佳温排水的速度(称为拐点速度),使排水对环境影响最小(对应最小面积)；随着环境流速的增大,拐点速度增大；随着热射流入射角的增大,拐点速度增大,最小面积减小。研究结果为海上风电平台温水排放系统的设计提供理论指导。

3D numerical simulation of warm water discharge in offshore wind power converter platform

In the offshore wind power converter platform, the discharge of cooling water will significantly influence the velocity and temperature fields in the ocean, and directly affect the survival of marine organisms. A three-dimensional model of cooling water discharge from an offshore platform is established. The computational fluid dynamics method with standard k-? turbulence model in FLUENT is used to calculate the velocity and temperature fields, and study the influence of environmental velocity, velocity and angle of the hot jet on the temperature field. The results show that as the velocity of hot jet increases, there exists a optimal velocity of the hot jet (denoted as the speed of inflection point) corresponding to the minimum temperature influence range (corresponding to the minimum influenced area). The speed of inflection point increases as the environmental velocity increases. When the angle of hot jet increases, the speed of inflection point increases and the minimum influenced area decreases. The present study provides theoretical guideline for the design of warm water discharge of offshore wind power platform.