查询词典 volute

Laser Doppler Anemometry was used to measure the velocity in volute and impeller of the pump. Three velocity components magnitudes were obtained, so was the mean square root fluctuating value.

运用激光多普勒测速仪，对旋流泵最优工况下的无叶腔及叶轮内部速度场进行了测量，得到周向速度、轴向速度、径向速度及其对应的均方根脉动速度分布等。

And evaluation extreme value method is used to obtain the volute width at the mi...

计算结果与试验结果吻合较好，与原蜗壳相比降低噪声3.5dB。

We also show two approaches to determine outer sections of double-volute passage with the same flow rate: one is based on functions in foreign literatures; the other based on principle of conservation law of moment of momentum.

同时，介绍了双蜗壳外侧等流量断面的两种设计绘形方法，即基于国外统计资料的速度系数法和基于速度矩守恒原则的数字积分方法。

The distribution of pressure in double volute is symmetry 180°, there is refluence on the tongue, there are also refluence and strike in the channel, the flux is different ,the degree of them are different.After analyzing the phenomena in a detailed way, we find there is unreasonable area in the design of volute.

双蜗壳内的压力分布呈180°对称分布，靠近蜗壳内侧的压力大于蜗壳外侧的压力，在隔舌处存在回流，在过渡流道内存在回流与撞击，流量不同，撞击和回流的程度不同。

The study on the design methodology of centrifugal compressor with low loss, high load, good performance under full condition and the CFD design of the turbo diffuser and volute is one of the front topics in the field of enhancing the turbosupercharger efficiency.

设计具有低损失、高负荷和良好全工况性能的压气机，以及对扩压器和蜗壳进行气动性优化设计是关系到提高涡轮增压器效率的前沿课题。

According to the experimental data, detailed analysis is made about the flow in the volute.

根据实验结果，从各个角度对该蜗壳内流体流动参数进行了分析。

A method to determine low noise fan volute structure is provided.

提供了一种确定低噪声离心通风机蜗壳结构的方法。

As for the hydraulic design of volute, its basic circle and tip area may be larger than others.

6结合CFD软件对所设计的两个叶轮进行了流动模拟。

It is available to carry out numerical simulation and fluid dynamic analysis further. Based on Frozen-Rotor Approach and Rotor-Stator Approach, the numerical simulation was carried out in the centrifugal pump and the numerical results showed that the flow in the impeller and volute of centrifugal pump is periodically unsteady. Due to the interaction between impeller and volute the flow is characterized by pressure fluctuations and it is the strongest at impeller outlet and at the vicinity of the tongue. The unsteady pressure fluctuations are also one of the most important reasons to induce vibration and noise. Secondly, the flow field of the volute is characteristic of the vortex flow, and the vortex flow presents very complicated developing process which is creating, increasing and dissipating every now and then. All these lead to very large flow loss in the volute.

采用Frozen-Rotor冻结转子模式和Rotor-Stator滑移界面模式系统开展了不同工况下离心泵内叶轮与蜗壳耦合的定常和非定常流动研究，结果表明由于叶轮与蜗壳的干扰蜗壳进口周向流动的不均匀性是非常强烈的，特别是叶轮与蜗舌间的相互干扰最为强烈，一直影响到叶轮进口和蜗壳扩散管出口的流场；在蜗壳内整个流动是以旋涡形式向出口推进的，并随着包角的变化旋涡表现出十分复杂的产生、发展和耗散的演化过程，导致蜗壳内较大的流动损失。

Design calculaton method of the increase in flow is not only applicable to the design of the low specific speed self- priming pump with single volute and outside mixture but also is abblicable to the design of the low specific speed self- priming pump with douple volute inside mixture and outside mixture.

增大流量设计计算法不仅适用于低比转数单蜗壳外混式自吸泵，同样也适用于低比转数双壳外混式和双蜗壳内混式自吸泵的设计。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。