中文摘要：

采用Yoo改进的旋涡风机性能预测数学模型,在其基础上,进一步考虑进出口流动损失及流量泄漏这2个因素,并通过风机性能试验进行验证。为考虑叶轮结构参数对风机两大性能指标即压升和效率的影响,基于性能预测数学模型,探讨压升和效率随叶片数、叶片厚度、叶片宽度和叶轮轮径比变化的规律。后采用正交试验法并结合极差分析结果,得到了叶片数、叶片宽度和轮径比对风机性能影响的主次顺序：轮径比对风机压升和效率影响均最大,而叶片宽度对风机效率影响最小,叶片数则对风机压升影响最小。最终确定了参数范围内基于旋涡风机性能的最优结构方案。

英文摘要：

On the basis of one-dimensional performance prediction code which is modified by Yoo, inlet and outlet flow losses and flow leakage were taken into consideration to predict the performance of a regenerative blower. And the theoretical results were in good agreement with experimental ones, which validated the modified prediction code. Next,blade number, thickness, width and hub-tip ratio of impeller, these four parameters were chosen to analyze the influence on the head-rise and efficiency of the blower. Then, the orthogonal testing method was introduced to design an orthogonal scheme, and the performance results in the case of each disposition scheme were obtained by means of theoretical calculation. After range analysis, the results show that hub-tip ratio of impeller has the greatest impact on both the head-rise and the efficiency of blower; blade width, however, gives the slightest impact on the blower efficiency and blade number is the slightest factor to the blower head-rise. Eventually, optimal structure parameters of the impeller are provided, which has proposed a design guideline to improve performance of the blower.