Measurement and control software for vehicle cooling system based on 3-access architecture

针对车辆冷却系统测控试验平台中的数据实时采集和电机控制问题,利用三层架构的开发思想,基于C#语言、Measurement Studio控件以及SQL Server数据库,在上位机中结合数据采集卡和传感器等硬件设计开发了车辆冷却系统的测控软件。详细介绍了三层架构的数据访问层、业务逻辑层、表示层在测控程序中的具体实现过程,完成了对测控数据的实时采集、存储与处理,绘制了测控数据实时曲线和历史曲线,以及实现了对风扇电机和水泵电机的控制等功能。同时,利用多次实验对测控程序的可靠性及稳定性进行了测试。实验结果表明,基于三层架构框架指导开发的软件具有更好的可读性、维护性和扩展性,满足车辆冷却系统试验平台的测控要求。Aiming at the problem of real-time data acquisition and motor control for vehicle cooling system test-bed,using the development thought of 3-access architecture,the measurement and control software of the vehicle cooling system was designed and developed by C #,Measurement Studio control and SQL Server database based on the hardware of data acquisition card and sensor in the host computer. The realization process of 3-access architecture of DAL,BLL and UI were introduced in detail in the measurement and control program,it finished real-time acquisition,storage and processing of measurement and control data,real-time curves and history curves,fan motor control and water pump motor control,and other functions. At the same time,the reliability and stability of the program were tested by several experiments.The results indicate that the software can improve the readability,maintainability and expansibility of the program,and meet the requirements of measurement and control based on 3-access architecture.福建省自然科学基金资助项目(2014J01210);; 深圳市科技计划项目(JCYJ20140417162429675

带内流道的板翅式换热器散热特性

针对目前对带内流道的板翅式换热器研究较少及其散热量计算误差较大等问题,基于空气、热流体及散热器三者耦合的基础,构建了带内流道的板翅式换热器散热特性的仿真分析模型以及小型风洞...福建省自然科学基金资助项目(2018D0018);; 中国科学院低温工程学重点实验室开放课题(CRYO201708)~

航空发动机面式空气滑油散热器性能分析

面式散热器位于航空发动机进气道段,可将进气道壁面作为传热表面,传热效率好,轻量化程度高;同时,与发动机工作同步,具有独立散热能力,更适用于地面停机、起飞滑跑等散热条件差的工况下。但目前针对航空发动机面式空气-滑油散热器的研究仍然较少。因此,本文基于分区模拟的方法开展了其传热特性分析,研究在不同分块模式下散热性能的等效性。数值分析的结果表明,采用4分块、7分块以及直平面代替弧面等条件下散热器和滑油温度分布及变化趋势都基本相似,且温度差都在1 K以内,通过滑油侧与空气侧计算出的单元散热器散热量偏差也都在5%以内。由此可知,采用分区模拟进行大型面式散热器的散热特性分析,针对弧长与直径的比在0.203以下的弧面模拟采用“以直代曲”等方法具有可行性和可靠性。福建省自然科学面上基金项目(No.2018D0018

Performance Analysis of Different Radiator Fins at Various Altitudes

为研究海拔对车辆散热器翅片性能的影响,编写了基于Matlab的管带式散热器计算程序,在验证仿真程序正确的基础上,分别计算不同热物理条件下百叶窗翅; 片、平直翅片、波纹翅片、锯齿翅片4种常见翅片散热器在不同海拔地区的空气侧和水侧出口温度、空气侧压降、空气侧换热系数、散热量等参数;分析了海拔变化; 对不同翅片散热器散热能力的影响,对比了不同翅片散热器在变海拔下的散热特性和风阻特性.由综合换热系数可知,百叶窗翅片的散热能力最强,锯齿形翅片的海; 拔适应性最好.In order to reveal the effect of altitude on the performance of vehicle; radiator fins,the simulation program for tubular radiator is developed; in Matlab environment. After verifying the correctness of the simulation; program, the air-side and water-side outlet temperatures,the air-side; pressure drop,the air-side heat transfer coefficient and the heat; dissipation of radiators with four common fins (namely; louver,straight,wavy and serrated fins) are calculated under different; thermal physical conditions at different altitudes. Then,the cooling; capacity of different radiator fins are analyzed under the influence of; various altitudes,and the heat transfer performance as well as the wind; resistance performance of different radiator fins at various altitudes; are analyzed in a comparative way. It is found from the obtained; comprehensive heat transfer coefficient that louver fin is of the; strongest cooling capacity, while serrated fin is of the best; adaptability to altitude.福建省自然科学基金资助项目; 深圳市科技计划项