M701F型燃气轮机SFC系统试验浅析与探讨

SFC系统有两个重要试验,一个是测速探头调整试验,另一个是SFC性能试验。本文以测速探头调整试验为例,对试验目的和意义、试验原理进行了说明,对试验项目及调整方法进行了阐述并提出了试验中应注意的事项,同时对SFC性能试验做了简单概述,供同行参考和探讨。     

核电站1E级变压器鉴定试验方法研究

针对核电站1E级变压器的鉴定方法进行了说明,建立了1E级变压器的试验鉴定流程。同时,对影响鉴定结果的试验顺序和试验中对试验结果可能造成偏差的关键点进行了阐述,指出在变压器鉴定试验过程中常出现的错误方法,对这些方法进行纠正。     

排气消声器声场的有限元法分析

本文对S195柴油机的排气噪声进行了详细试验和理论研究.通过试验测量了S195柴油机的排气噪声频谱,并且对采用不同膨胀比消声器的消声效果进行了试验研究.此外,研究了不同穿孔板位置对简单膨胀腔消声器排气噪声的影响.运用有限元方法对消声器的声场进行分析,并与试验结果对比.由于对计算模型进行了简化,所以计算结果与试验结果有差异,但是两者的趋势是一致的.     

排气消声器声场的有限元法分析

本文对S195柴油机的排气噪声进行了详细试验和理论研究。通过试验测量了S195柴油机的排气噪声频谱,并且对采用不同膨胀比消声器的消声效果进行了试验研究。此外,研究了不同穿孔板位置对简单膨胀腔消声器排气噪声的影响。运用有限元方法对消声器的声场进行分析,并与试验结果对比。由于对计算模型进行了简化,所以计算结果与试验结果有差异,但是两者的趋势是一致的。     

一维火焰燃烧NOx、SOx排放规律试验研究

主要针对煤粉燃烧过程中硫、氮的析出特性进行了试验分析和理论探讨,对影响硫、氮析出的因素煤质特性、结构参数和运行参数进行了试验研究.在试验基础上,对NOx、SOx排放规律进行了理论探讨,对污染物减排及优化燃烧提供理论指导.     

焦化厂荒煤气余热回收系统试验研究

针对所开发的荒煤气余热回收装置,文中介绍了系统工艺流程和核心技术换热装置,然后对荒煤气余热资源进行理论计算,在此基础上提供了主要设备选型参数。通过为期26d的工艺试验,对试验数据进行整理并对试验效果进行了定量分析,试验表明该余热回收装置基本满足设计要求,可以进行市场化投运。     

槽式太阳能热发电站中太阳岛的集热器回路的压力试验分析

为确认槽式太阳能热发电站中太阳岛的集热器回路的结构强度及密封性,需在施工时对集热器回路进行压力试验,本文分别对采用除盐水或导热油的水压试验和采用氮气或压缩空气的气压试验进行了分析及对比,在综合考虑了试验成本、工艺复杂度和对集热器回路造成的危害等因素后,最终选用压缩空气作为介质进行压力试验.根据相关计算结果和试验程序,在...     

机车操纵台、电器柜导通试验方法的选择及设计

通过对试验方法的比较,就如何根据生产需要,选择合适的试验方法对电器柜和操纵台进行导通试验做了分析和探讨,并提出了试验台的设计思路。     

轴承巴氏合金磨损试验的优化设计

在MG-2000摩擦磨损试验机上采用改进的环环试验方法进行巴氏合金与轴颈材料对磨试验,通过对试样优化设计,确定了试样的最佳尺寸和形状,改进了试验方法。试验结果与工程实际情况相吻合,该试验方法和所确定的试样形式和尺寸适合用于汽轮机大型滑动轴承边界润滑状态下的巴氏合金磨损试验。     

"天驰"号动车组动力学试验与分析

介绍了"天驰"号动车组动力学试验的步骤、方法和在试验过程中须注意的问题,对试验结果进行了分析和评估。     

Unerroric of control of mutual compliance of the efficiency of hydrogen engines of unmanned vehicles in the conditions of mass production

The issues related to the reliability of hydrogen engines of unmanned vehicles and increasing the efficiency of using hydrogen as fuel when using the method of its production during the decomposition of hydrogen-containing molecules of liquid-phase organic compounds in a plasma discharge under the action of intense ultrasonic exposure are considered. Experiments have shown that as a result of decomposition in the acoustoplasma discharge of liquid hydrocarbons, solid-phase carbon-containing products are formed, chemical transformations occur in the liquid phase and hydrogen-containing combustible gas is formed. Hydrogen-containing gas can be used as fuel immediately after synthesis, i.e. it does not require separation, since in addition to hydrogen it contains only impurities of CO₂ and water vapor. The purpose of the study is to formalize the basic conditions for tightening the control of mutual compliance with the efficiency of hydrogen engines of the same series in the conditions of their mass production. Methods of mathematical statistics and hardware-software modeling were used in the study. The term “unerroric of quality mutual compliance control” is introduced to describe a set of hardware and software tools for such control. The principle of in-depth testing of the technical condition of such engines of one series is described in a multidimensional formulation of the quality control problem for three of their operating parameters at once. The conditions for increasing the mutual correspondence of the measured values of such parameters in the conditions of serial production of hydrogen engines are formalized.     

小型锅炉烟尘测试时锅炉出力的计算

锅炉烟尘测试时,必须对锅炉出力进行测试。但监测中,许多小型锅炉往往不具备相关的计量装置和仪表,为解决这一问题,文章提出了用烟气量和空气过剩系数来计算锅炉的出力的公式,在实际使用中,该方法简单易行,其结果和实测值具有很好的一致怀。     

中国煤炭地下气化技术的发展

本文综述了煤炭地下汽化技术的国内外发展现状,对我国“长通道、大断面”煤炭地下气化新工艺给予了技术经济评述,并提出了发展煤炭地下汽化技术的政策建议。     

生物质催化热裂解技术的研究进展

生物质催化裂解是生物质热化学转化的一种重要途径。综述了生物质催化热裂解技术使用的反应器、催化剂类型,以及催化热裂解过程中热裂解温度、吹扫气、升温速率、生物质原料等条件的影响,展望了生物质催化热裂解技术的发展趋势。     

Constructal optimization of the geometry of an array of micro-channels

This paper documents the geometric optimization of an array of circular and non-circular ducts. The optimization was carried out numerically using finite volume method. As optimal dimensions were independent of the array configuration, the numerical simulation was performed on a unit cell. Numerical optimization for circular, square and isosceles right triangle cross-sections of channels was performed. Based on the results of this investigation, some correlations were proposed to predict the optimal hydraulic diameter and dimensionless heat transfer per unit volume. In addition to examining the effect of pressure drop on these parameters, it was showed that among the different geometries of this study, square cross-section has the most efficiency for a given volume. The numerical results of the present study were compared with approximate results reported in the literature which a good agreement was observed.     

固体热辐射Yong性能分析

本文对漫灰均温物体在常物性条件下对外辐射传热的Ｙｏｎｇ值计算建立了数学模型。通过与物体内能Ｙｏｎｇ公式的数值计算比较,得出了辐射能量的Ｙｏｎｇ值不大于内能Ｙｏｎｇ值的结论。从初步的热射Ｙｏｎｇ值计算公式发现。Ｙｏｎｇ与物体表面辐射率有关。     

机车车轮多轴疲劳强度安全评定的研究

使用ANSYS8.0软件对高速列车车轮进行了三维有限元分析,计算出车轮在直线、曲线和道岔条件下牵引、制动共6种工况时孔边薄弱部位的应力,分别通过Mises等效平均应力方法、Sines平均主应力方法和应力分量中考虑平均应力方法计算出应力在极值位置时的等效应力幅、等效平均应力,从而进一步算出车轮的安全系数,对其疲劳强度进行评定,并对3种方法进行了比较研究。     

Review of theory of distortion and disintegration of liquid streams

Linear and nonlinear analyses of the instabilities and distortion of liquid streams injected into a gaseous media are discussed. The various fundamental mechanisms and the predictive capabilities for the distortions are emphasized. Round jets, planar sheets, annular sheets, and conical sheets are discussed in detail. The balance between capillary and inertial forces is primarily examined. The method for simplifying the analyses in the case of thin liquid sheets is discussed. The capabilities for representing the droplet size distribution that follows the stream disintegration are outlined.     

汽轮机零件防锈性能的改善

介绍了汽轮机零件的封存特点、防锈要求及防锈油性能对比试验的方法,通过对试验结果的对比分析,客观验证了各种防锈油的性能。试验表明,只有选择了合适的防锈油,才能保证汽轮机零件长期封存的质量。     

Measurements of concentration distribution of hydrogen jet using deflection of center of the laser spot

The main purpose of this work is to propose a new method to evaluate the concentration distribution of the hydrogen jet by using a He–Ne laser through the jet. This research attempts to apply the expression of concentration Gaussian distribution, the refraction formula of inhomogeneous refractive index medium, and the concentration inversion function to disclose the displacement of the center of the laser spot at different heights in the gas jet. The spot images of the laser beam passing through the gas jet at three vertical heights z = 10d, 20d, 30d, and different radial positions are obtained. The radial spatial asymmetry of the gas jet is also found in the experiment. Finally, the calculated concentration distribution curve and the fluent simulation curve, it is found that the two results are very similar. Our findings show that the error between the concentration distribution of this method and the simulated concentration distribution reaches 2.43%.