查询词典 diffuser

By Ensemble-averaged Method, the mean field was got to show the 3D structure of flow. By Phase-locked Averaged Technique, the periodic mean field was got to reflect the periodic unsteady characteristic. The 3D structure and the periodic unsteady characteristic of the unsteady flow within the vaneless and vaned diffuser were discussed through analyzing the mean field and the periodic mean field.

离心风机扩压器内非定常流动的实验研究本文完成了离心风机两种结构条件下无叶扩压器、有叶扩压器内部的非定常流动瞬态全流场的实验测量，获得了不同运行工况下PIV的瞬态流谱，为研究扩压器内部非定常流动提供了基础实验资料。

The conclusions provide reference to the design of vaneless diffuser.

文章的结果，对无叶扩压器的设计具有一定的借鉴意义。

Moreover, the internal flows of impeller, vaneless diffuser, bend and other parts of the stage are obtained by calculation, and the numerical results are discussed in details.

同时对计算结果进行了详细的分析。计算表明，本文所采用的紊流模型和数值方法能较好的预测离心压缩机各部件内部的流动。

Vaneless diffuser rotating stall in centrifugal compressor limits its operation range.

无叶扩压器的旋转失速限制了离心压缩机的运行范围。

After main parameters of impeller and casing are optimized using the numerical predictions of aerodynamic performance, the size of the vaneless diffuser and the relative place between the impeller and casing are optimized to decrease the friction loss.

利用气动性能数值预估对叶轮和蜗壳的主要参数进行优化后，再对无叶扩压器的大小和叶轮与蜗壳的相对位置进行优化，减少摩擦损失，最终得到的后向通风机测试结果，全压和效率均提高了11％。

Steady-state simulation including the impeller,vaneless diffuser and volute with different configurations of inlet pipe was carried out to investigate the effects of inlet pipe on the compressor performance.

用数值模拟研究了不同进口管道对离心压气机性能的影响。计算模型包括进口管道、离心叶轮、无叶扩压器、蜗壳和出口管道。

Secondly, a plenum chamber model is added at the vaneless diffuser outlet to simulate the rotating stall flow phenomenon inside the centrifugal compressor.

然后引入出口气腔模型，模拟离心压缩机内的旋转失速流动。

Numerical simulation results of rotating stall flow phenomenon inside a centrifugal compressor with vaneless diffuser by solving three-dimensional Reynolds averaged compressible N-S equations using commerical CFD software CFX adopting RNG k-ε turbulence model are presented.

使用商业计算流体力学软件CFX求解三维雷诺平均的Navier-Stokes方程组，结合出口气腔模型对某带无叶扩压器的离心压缩机的旋转失速现象进行数值模拟。

This paper studies numerically the influence of the tip clearance on the three-dimensional viscous flowfield and performance of the NASA Low-Speed Centrifugal Compressor impeller with a vaneless diffuser. A three-dimensional viscous code developed by the authors is applied with several acceleration methods: local time-step, multigrid and residual smoothing.

通过求解N-S方程，数值研究了叶顶间隙对NASA低速大尺度离心压缩机三维粘性流场及气动性能的影响，在计算程序中采用了当地时间步长、多重网格以及隐式参差光顺来进行加速。

Red Bull has succeeded in readying a 'double diffuser' solution in time for this weekend's Monaco grand prix.

红牛成功地准备'双扩散的解决方案中的时间是在周末的摩纳哥大奖赛之前仅仅。

Researches reveal that students who suffer from corporal punishment tend to resort to violence in their future life.

研究表明遭受过肉体惩罚的孩子倾向于在他们今后的人生中使用暴力。

Total sugar of sarcocarp and chlorophyll of pericarp increased firstly, and then decreased afterward along with altitude; Titratable acidity, ascorbicacid and anthocyanin of pericarp were increased along with altitude; The content of protein increased firstly and decreased afterward along with altitude; Carotenoid of pericarp were decreased along with altitude.

果肉总糖和果皮叶绿素含量随海拔高度升高先升高后降低；可滴定酸、维生素C和果皮花青苷含量均随海拔升高而升高；蛋白质在1720m处最大，1420m处最小；果皮类胡萝卜素随海拔升高而降低。