查询词典 expansion chamber

The design method is described, and the calculation results are presented under the standard air conditioning condition. The working process of the two-stage expander is discussed, and the difference between the two-stage expander and the conventional one is stated. In addition, the influence of the dip angle on the expansion chamber volume is analyzed. The results show that the dip angle has little effect on the expansion chamber volume and it is suggested that the effect may be neglected in the expander design.

介绍了该膨胀机的设计方法，给出了标准空调工况下的计算结果，详细讨论了两级旋叶式膨胀机的工作过程，并对两级膨胀机与传统旋叶式膨胀机的区别进行了论述，最后分析了滑片倾角对工作腔基元容积的影响，结果显示，滑片倾角对工作腔基元容积的影响很小，在膨胀机的设计过程中忽略滑片倾角的影响是合理可行的。

The work of Sullivan and Crocker suggests porosity in the range of 5 to 10% to achieve the expansion chamber.

国外的Sullivan 和 Crocker已推导出穿孔管的穿孔率在5－10％范围内会起到共振腔的效果。

Based on the comprehension of the researches of CO2 expressor, rolling piston expresser has been designed independently with the roilling pistons of expansion chamber and compression chamber integrated with the same shaft. Design parameters have also been calculated concretely

综述了国内外CO2膨胀压缩机的研究现状，分析了现有膨胀压缩机的技术特点，独立设计了膨胀腔活塞与压缩腔活塞同轴联接的滚动活塞式膨胀压缩机，同时，还进行了具体的参数计算。

The experimental results show that the mean particle size of griseofulvin precipitated by RESS is smaller than 1, 0μm, narrow distribution and 95％ fine particles is smaller than 1. 0μm. Increase of the pre-expansion pressure, the extraction temperature, the expansion chamber temperature, the spraying distance, the concentration of cosolvent and decrease of the nozzle diameter resulted in decrease of the particle size under the operating condition studied. Enhancement of the pre-expansion temperature resulted in increase of the particles size. The SEM of GF shows that the shape of original is atactic and a wide size distribution, but the microparticles obtained by RESS is reverse. Similar melting points and XRD patterns were observed for the original material and the precipitates obtained by RESS.

实验结果表明，用含夹带剂的RESS法制备的灰黄霉素微粒的平均直径在1μm左右，且分布均匀，95％微粒在1μm以下，仅用CO〓作为超临界流体制备的微粒与上述方法制备的微粒的平均直径和分布相似，只是产量太低，而用机械法制备的微粒平均直径在3μm左右且分布较宽；不同的过程参数对沉析微粒尺寸有不同的影响，预膨胀压力、膨胀室温度、溶解温度以及夹带剂浓度的提高或增大，均可使沉析微粒的直径变小；预膨胀温度提高，所得微粒的直径变大；喷射距离的增加，沉析微粒的直径变小；喷嘴直径越小，由此制得的微粒的直径就越小；根据实验结果还可知道，通过理论计算的马赫盘处微粒的直径可以较好地估计出膨胀室中收集到的微粒的直径。

Manufactured from platinum and rhodium embedded in a stainless steel honeycomb, the catalyser is situated in the silencer's first expansion chamber, while the oxygen sensor is located between the EXUP valve and silencer.

制造铂和铑的嵌入式在一个不锈钢蜂窝， catalyser是坐落在该消声器的第一膨胀室，而氧传感器是位于之间的exup阀和消声器。

An exhaust passage (54) passes through the coolant chamber and communicates with an exhaust expansion chamber (67) formed by an extension case (4) to be positioned below the mounting case.

排气通道(54)穿过冷却剂室，并与由延伸壳体(4)形成的排气膨胀室(67)连通，该延伸壳体位于支撑壳体下面。

So that the channel immediately exit valve seat to prevent the rapid expansion of body wall and the wall suffered cavitation damage, and for Water in the needle valve, the expansion chamber diameter of 1.5 times the diameter of including pull back the export channel, including length of 8 times the diameter when subjected to cavitation can be avoided.

使紧接阀座出口端的通道急剧扩大可防止阀体壁和管壁遭受气蚀损坏，对用于水厂中的针形阀，其扩大腔室的直径为管径的1.5倍，包括出口退拔在内的通道长度为管径的8倍时，可避免遭受气蚀。

Furthermore, the geometrical ending-profile of an expansion chamber has an influence on both frequency period and amplitude of TL. The appropriate offset of inlet and outlet of an expansion muffler can increase its working frequency range. The findings presented in this paper can be used as a design guideline for a high performance muffler.

结果表明，扩张室为圆形截面的消声器性能优于椭圆形和矩形截面消声器；扩张室端部形状不仅影响消声器传递损失的大小，还影响到传递损失的变化周期；当进出气管之一与扩张室轴线偏离一定距离时，可有效地提高消声器的消声频率，改善消声性能。

Using fluid dynamics FEM (two dimensional, three dimensional andaxisymmetric) and three dimensional acoustic FEM in meticulous analysis ofexpansion muffler structure, this paper studies the influences of each mufflercomponents' position, dimension, form and quantity on the fluid dynamic andacoustic performances;therefore the paper indicates that the end of the intruding tubeis the linchpin of the fluid dynamic performance of the whole muffler structure, thespringhead of muffler fluid dynamic performance is the smoothness of air current, themain factor which affects the acoustic attenuation value of expansion chamber muffleris the grade of saltation of the section of air conducting access, and the attenuationvalue of specific frequency can be dramatically enhanced by carefully designing thelength of expansion chamber.

本文通过流体力学有限元方法和三维声学有限元方法对扩张腔消声结构的参数化模型进行了细致的分析，研究了这种结构的各个组成部份的位置、大小、形状和数量对其流体力学与声学性能的影响，指出插入管端口是影响整个结构流体力学性能的关键，消声结构流体力学性能的根源是气流通过时的平稳程度；影响扩张腔消声量的主要因素为声波传播通路截面突变的程度，并可以通过精细的设计扩张腔轴向长度获得宽频或指定频率消声量的大幅度提高。

Based on the integration of the results of acoustic andfluid dynamic analysis, this paper points out that synthetical acoustic and fluiddynamic performance of muffler can be obtained by using square expansion chamber,by stringing together several podgy expansion chambers, by applying noise absorbingmaterial on chamber walls, by making chambers and pipers co-axial, by adding filletson the end of intruding pipes, and by making the diameter of outlet pipe a little greaterthan the diameter of the inlet pipe.

通过综合流体力学和声学有限元两方面的分析的结果，指出了采用方形扩张腔，采用多个短粗扩张腔串联，扩张腔壁面附吸声材料，使各管道同轴，在插入管端口加上圆角，并且令出口插入管管径略微大于入口插入管管径可以使消声结构获得最佳的声学和流体力学综合性能。

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。