%0 Journal Article
%T Design of a Three-Dimensional Centrifugal Fan with Controlled Blade Loading Approach
%A Jin Xiong
%A Xin Ai
%A Kaibin Wang
%A Jingyin Li
%J Open Journal of Fluid Dynamics
%P 410-425
%@ 2165-3860
%D 2017
%I Scientific Research Publishing
%R 10.4236/ojfd.2017.73028
%X <div style=\"text-align:justify;\">
	The high flow-rate centrifugal fan needs a three-dimensional impeller to achieve
a high efficiency. In this paper, the design procedure of a high-efficiency
three-dimensional centrifugal fan is presented. First, the main dimensions of the
fan were calculated by using the conventional one-dimensional method. Then,
the blade loading or the angular momentum distribution along the meridional
streamline on the blade surfaces is prescribed. After that, the three-dimensional
blade is determined by using the streamline curvature method. With the aid of
numerical simulations, the performance of the three-dimensional fan was improved
and some of the key influence factors were investigated. The analyses
indicate that, as to the high flow-rate centrifugal fan, the Stanitz modified formula
is recommended to calculate the separation radius, <i>r<sub>b</sub></i>. A proper increase in
the separation radius is beneficial for the fan¡¯s performance. It is also indicated
that a decrease in the angular momentum on the hub leads to an increase in total
pressure efficiency, under the condition of a given constant mean angular
momentum at the outlet of the blade. In addition, the installation of a fairing on
the hub plate can improve the fan¡¯s efficiency evidently when the streamline
curvature method is adopted to design the three-dimensional impeller.
</div>
%K Centrifugal Fan
%K Controlled Angular Momentum
%K High Flow-Rate
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=79372