查询词典 compressor-expandor

A turbocharger is a dynamic compressor, in which air or gas is compressed by the mechanical action of impellers, vaned rotors which are spun using the kinetic movement of air, imparting velocity and pressure to the flowing medium.

蒸气增压器是一台动态压缩机，在哪空气或气体由叶轮的机械行动压缩，使用空气的运动运动转动的vaned电动子，给予速度和压力到流动的媒介。

On the basis of three dimensional viscous numerical simulation on the internal flow field in the vaned diffuser of a centrifugal compressor,the influence of shaper parameters on the pneumatic performance in low solidity vaned diffuser is compared.

通过对一离心压缩机叶片扩压器内部流场进行三维粘性数值模拟，对比分析了小稠度扩压器的主要形状参数对气动性能的影响。

The reasonable radial gap is discussed to optimum the performance of the compressor. For the analysis of the different vane incline angle, the focus is the investigation on the flow field of the pressure side in the vaned diffuser.

分析了无叶扩压段变化对离心压气机性能的影响方式，以及其对叶轮和扩压器相互作用强度的影响，探讨了合理选择无叶扩压段对于离心压气机性能的优化的可能。

It prove that the hub airfoil-vane diffuser can improve the performance of a compressor with a vaneless diffuser.

只有改善扩压器内气流的流动情况，才能进一步提高气体压力，获得较高的整级效率。

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。

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。

The flowfield and performance of a centrifugal compressor was predicted and analysed, which was composed of a Krain's impeller and two types of vaneless diffuser specially: one was constant area vaneless diffuser and the other was the straight-wall. The results show that the efficiency of the straight-wall vaneless diffuser is obviously lower than that of the constant area, and a separate flow occurs nearby the exit of the centrifugal impeller with the straight-wall diffuser. However, the type of vaneless diffuser has little influence on the aerodynamics performance of the centrifugal impeller. Finally, it is suggested that the constant-area vaneless diffuser should be selected as the downstream extended area of the centrifugal impeller during the prediction for the centrifugal impeller.

对Krain叶轮后带等面积与直壁两种形式的无叶扩压器离心压缩机内部流场进行了计算与分析，结果表明：直壁型无叶扩压器离心压缩机的效率低于等面积无叶扩压器离心压缩机的效率；直壁型无叶扩压器使得叶轮出口的流动出现分离；扩压器的形式对离心叶轮的整体气动性能影响并不大；在进行离心叶轮数值研究时，叶轮后的延伸区最好采用等面积无叶扩压器，以尽量减小无叶扩压器所引起的计算误差。

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。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新