风速计安装间距对其测量偏差的影响研究  

Influence of the Mounting Distance between the Anemometers on the Measurement Bias

作　　者：袁带英[1] 

机构地区：[1]四川建筑职业技术学院交通与市政工程系,四川德阳618000

出　　处：《电网与清洁能源》2013年第12期126-130,共5页Power System and Clean Energy

摘　　要：以某风场1.5 MW风电机组作为研究对象,根据流体力学以及风速的空间相关性特性对机组两个风速计测量偏差进行研究。研究表明,叶根后部湍流在不同风速下,其影响区域宽窄不同,两相距一定距离的风速计不能迅速处于同一流体状态,从而导致所测的风速值不同。另外,不同两点间风速空间距离越大,相关性越低,数值差异越大,因此,两个风速计间的安装距离是影响测量结果偏差的主要原因之一。Taking a 1.5 MW wind turbine of a certain wind farm as an example, this paper studies the measurement bias of two anemometers in the wind turbine according to fluid dynamics and spatial correlation characteristics of wind speed. The study shows that the influence area of turbulence generated behind the root of the blade is different width at different wind speeds. The two anemometers of a certain distance cannot put into the same fluid state rapidly simultaneously, resulting in different measured values of the wind speed. Furthermore, with the increase of the spatial distance, the correlation of the wind speed at two different points is reduced, and the value is of greater difference. Therefore, the installation distance between the two anemometers is one of the main causes for the deviation of measurement results.

关 键 词：间距 风机 湍流 空间相关性 

分 类 号：TK83[动力工程及工程热物理—流体机械及工程]