螺旋流增压排气系统应用研究

本文对螺旋增压排气系统在三种增压柴油机上的应用情况进行了总结，对柴油机采用该系统过程中的相关问题进行了初步探讨。     

高增压系统相继增压技术的试验研究

本文报告了在一台ＭＷＭＴＢＤ２３４Ｖ８柴油机上所进行的相继增压试验研究结果．试验结果表明,相继增压系统不但可有效解决高增压后的柴油机低工况性能问题,而且能改善标定点的运行性能,从而可在整个运行范围内改善高速高Ｐｍｅ柴油机的工作性能。本文关于高增压系统相继增压技术的研究成果可用于高速高Ｐｍｅ柴油机增压系统的开发,提高高增压柴油机的性能指标与技术水平．     

探讨车用内燃机的增压技术（一）

详细分析了车用内燃机增压方面的问题，说明了增压机的特点，对车用增压机的要求及对车用增压机的特殊要求和需要解决的主要的问题。     

舰船用超高增压柴油机的顾氏系统研究

针对柴油机超高增压后存在的机械负荷、热负荷过高及低工况供气不足等问题，本文以一超高增压舰船用柴油机为例，进行了顾氏系统、相继增压系统、高工况放气系统及几种常规增压系统的性能对比。结果表明，顾氏系统能降低柴油机机械负荷、热负荷、燃油消耗率及NOx排放量，改善低工况性能，与相继增压结合可进一步降低NOx排放量，提高Pme，拓宽柴油机运行范围。文中通过性能优化确定了顾氏系统正时规律，从中还得出了其控制中的最低调节工况概念，据此完成了顾氏系统控制机构的优化设计，并就系统动力学效应及其对柴油机换气特性的影响进行了讨论。     

493ZQ型增压柴油机增压系统的设计及试验

本文以车用增压柴油机增压系统的设计为依据，对排气管中的废气能量及涡轮增压器与柴油机的匹配进行阐述、计算，并对增压器的选取、进排气管的设计进行分析，最后经发动机台架试验验证了上述设计的正确性。     

495AZD型增压柴油机排气系统的设计与试验研究

本文作者对４９５ＡＺＤ型增压柴油机的排气增压系统进行了一系列设计、优化和试验研究。试验结果表明，选用的４９５ＡＺＤ型增压柴油机单出口排气系统较为合理。     

二次进气增压系统和顾氏系统的研究

中介绍了二次进气增压系统和顾工系统新概念。这二种系统都能降低油耗率，最大爆发压力、热负荷和ＮＯｘ假使涡轮增压器总效率大于６５％，这二种系统能利用缸内膨胀回收排气的剩余功，而不用动力涡轮，所以结构上大为简单而不动力涡轮系统的附加投资。模拟计算和试验工作曾在６ＰＡ６Ｌ－２８０和６ＭＡＰＮＬ５８／６４柴油机上进行，二次进行气系统，顾氏系统，与通常的涡轮增压系统和动力涡轮系统的性能比较结果是十分令人鼓舞     

柴油机相继增压系统仿真研究

随着增压压力的提高,柴油机低工况运行时的性能越来越差,相继增压系统用于改善高增压柴油机低工况性能.在Matlab/Simulink仿真软件环境中,应用计算机仿真方法,建立了相继增压柴油机的"准稳态"数学模型,主要对相继增压系统的动态切换过程进行了模拟,通过仿真计算分析了相继增压系统动态切换过程的影响因素及其对柴油机的影响.     

螺旋流增压排气系统应用研究

本文对螺旋流增压排气系统在三种增压柴油机上的应用情况进行了总结 ,对柴油机采用该系统过程中的相关问题进行了初步探讨     

车用柴油机涡轮增压匹配系统软件开发

根据涡轮增压柴油机的平均参数模型,建立了车用柴油机增压选型与匹配系统,可以完成对增压方案的选取、增压参数的计算以及增压器型号的选取等工作;以Visual C++为开发平台,进行了系统软件的开发;以D6114柴油机为例进行了匹配计算,并与相应的试验结果进行对比,两者吻合良好,进一步验证计算模型、程序的正确性。     

SA-335P91钢的焊接工艺探讨

随着SA-335P91钢在电站锅炉中的广泛应用,SA-335P91钢的焊接问题备受关注。本文介绍了SA-335P91钢的性能特点和焊接性,阐述了SA-335P91钢的焊接过程中的问题,探讨可以保证良好的焊接质量前提下SA-335P91钢的焊接要点。     

三维成像激光雷达图像与摄像机图像的融合

与传统的二维图像信息相比,物体的三维彩色信息能够更加全面的、真实的反映客观物体。本文通过对成像激光雷达图像的分析,利用摄像机的针孔模型,获取成像激光雷达图像与摄像机图像对应点的对应关系,实现了三维图像与二维图像的融合。     

电缆故障报警自动定位系统设计与实现

鉴于电缆的应用越来越广泛,电缆故障的种类越来越多,故障发生的频率也越来越高。本文对于频发的电信电缆中断事故,本文提出了一种电缆故障自动报警定位系统的设计方案。系统采用电容检测法和电阻检测法相结合,根据定期测得的单位长度电容、电阻值,测算出故障电缆长度。实验和应用结果表明,系统结构紧凑、功能齐全、使用简单易学、测量精度高、无误报、成本低廉。     

On the possibility of increasing the accuracy in the calculation of the solar ultraviolet radiation index

It has been indicated that the accuracy in the calculation of the solar UV index can be increased by the organization of more reliable measurements of the total ozone in the Chappuis band. The mathematical condition under which ozone measurements become advisable in the visible part of the spectrum (Chappuis band) is determined. A technique for calculating the UV index of the Sun has been proposed.     

Brief Historical Perspective in Thermal Management and the Shift Toward Management at the Nanoscale

Since the early days of computing, excess heat has been a major road block in the design and development of faster, more efficient, and more compact electronic devices. Coupled with improvements in thermal management has been a reduction in the size of major electronic components, primarily transistors. This has expanded the field of thermal management down into the nanoscale, where the “rules” of thermal transport become more complicated. This paper presents a brief perspective on the historical challenges in thermal management and outlines the major length scale regimes where thermal management is being developed. In particular, the expansion of thermal management into the nanoscale is presented due to the consequence that as the feature size of most nano-devices continues to diminish, the impact of thermal transport across solid-solid interfaces on device performance, reliability, and lifetime becomes increasingly important.     

Experimental Investigation on the Performance of [APMIm][NTf2] for Capturing CO2 from Flue Gas of the Cement Kiln Tail

Facing the global wanning trend,humanity has been paying more and more attention to the Carbon Capture,Utilization and Storage.Large amounts of CO2 is emitted w...     

Evaluation of the economic impact of hydrogen production by methane decomposition with steam reforming of methane process

There has been considerable interest in the development of more efficient processes to generate hydrogen. Currently, steam methane reforming (SMR) is the most widely applied route for producing hydrogen from natural gas. Researchers worldwide have been working to invent more efficient routes to produce hydrogen. One of the routes is thermocatalytic decomposition of methane (TCDM) - a process that decomposes methane thermally to produce hydrogen from natural gas. TCDM has not yet been commercialized. However, the aim of this work was to conduct an economic and environmental analysis to determine whether the TCDM process is competitive with the more popular SMR process. The results indicate that the TCDM process has a lower carbon footprint. Further research on TCDM catalysts could make this process economically competitive with steam methane reforming.     

A Lattice Boltzmann Formulation for the Analysis of Radiative Heat Transfer Problems in a Participating Medium

Use of the lattice Boltzmann method (LBM) has been extended to analyze radiative transport problems in an absorbing, emitting, and scattering medium. In terms of collision and streaming, the present approach of the LBM for radiative heat transfer is similar to those being used in fluid dynamics and heat transfer for the analyses of conduction and convection problems. However, to mitigate the effect of the isotropy in the polar direction, in the present LBM approach, lattices with more number of directions than those being used for the 2-D system have been employed. The LBM formulation has been validated by solving benchmark radiative equilibrium problems in 1-D and 2-D Cartesian geometry. Temperature and heat flux distributions have been obtained for a wide range of extinction coefficients. The LBM results have been compared against the results obtained from the finite-volume method (FVM). Good comparison has been obtained. The numbers of iterations and CPU times for the LBM and the FVM have also been compared. The number of iterations in the LBM has been found to be much more than the FVM. However, computationally, the LBM has been found to be much faster than the FVM.     

Developments in solar energy utilisation in the United Kingdom

The United Kingdom is situated such that, until recently, it has been regarded as an unsuitable location for applications of solar energy. However, a considerable amount of work has been carried out over the past twenty years and, more recently, there has been a tremendous increase in all areas of activity. The broad conclusions which can be drawn from the work so far indicate that solar energy could make a significant contribution to the energy requirements of the United Kingdom.     

柴油机有害排放物控制技术的新发展

回顾了近几年来柴油机有害排放控制技术的发展状况，认为要满足未来越来越严格的排放法规，要采取全面的，系统的措施，即通过采取以改进柴油机设计的机内净化措施、燃料的改质和排气净化后处理相结合的综合措施，此外，还对柴油机有害排放控制技术今后的发展进行了预测。