太阳能热气流发电系统导流体的模拟和实验研究  

Simulation and Experimental Research on the Diversion in Solar Chimney Power Plant System

作　　者：陈举胜 王海霞[1] 李洪松 刘宇飞 李庆领[1] CHEN Jusheng;WANG Haixia;LI Hongsong;LIU Yufei;LI Qingling(College of Electromechanical Engineering,Qingdao University of Science and Technology,Qingdao 266061,China)

机构地区：[1]青岛科技大学机电工程学院,山东青岛266061

出　　处：《青岛科技大学学报（自然科学版）》2021年第4期73-79,共7页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：山东省重点研发科技攻关项目(2019GGX104034)。

摘　　要：为提升太阳能热气流发电系统输出功率,对烟囱底部导流体的不同形状进行研究。基于等效速度理论,提出一种新型等效速度面划分方式,以此计算输出功率。通过数值模拟研究不同形状导流体对烟囱内部速度场和压力场的影响,将透平装置截面处依据模拟结果划分为高速区和低速区,并通过实验对模拟结果进行验证。结果表明:导流体形状不同,烟囱内部的速度场和压力场变化显著。高速区内圆台导流体对等效速度及输出功率的提升优于其他形状的导流体,且烟囱底部负压增幅最大,提升效果明显,模拟结果与实验具有较高的吻合度。In order to increase the output power of the solar chimney power plant system, the different shapes of the diversion at the bottom of the chimney were studied in this paper. Based on the equivalent velocity theory, a new method of dividing the equivalent velocity plane was proposed to calculate the output power. Using the method of numerical simulation, the different shapes of the diversion were simulated to explore the influence of the velocity and pressure field inside the chimney. According to the simulation results, the turbine plane was divided into a high-velocity zone and a low-velocity zone. The simulation results were verified by experiments. The results showed that the velocity and pressure field inside the chimney had changed significantly when the shape of the diversion was different. In the high-velocity zone, the round-table diversion was better than other forms of diversion. This advantage was reflected in the equivalent velocity, output power and negative pressure at the bottom of the chimney. The simulation results were consistent with the experimental results.

关 键 词：太阳能热气流发电系统 导流体 等效速度 速度场 压力场 输出功率 

分 类 号：TK514[动力工程及工程热物理—热能工程]