介绍了当前工程子午胎的市场需求状况和国内外的生产技术水平,指出理论分析技术应当在提高工程子午胎的质量方面发挥重要作用。进而回顾了理论分析技术在轮胎中的应用及其衍生的轮胎设计理论。分析了理论分析技术在轮胎应用中的发展趋...介绍了当前工程子午胎的市场需求状况和国内外的生产技术水平,指出理论分析技术应当在提高工程子午胎的质量方面发挥重要作用。进而回顾了理论分析技术在轮胎中的应用及其衍生的轮胎设计理论。分析了理论分析技术在轮胎应用中的发展趋势。介绍了子午线轮胎"动态仿真综合分析系统CASDS(Comprehensive Analysis System by Dynamic Simulation)"的技术路线和技术成熟程度,并简要介绍了整胎"Semi-Tweel"模型。国内轮胎企业尤其是投资工程子午胎项目的企业应重视理论分析技术重要价值。展开更多
The single-phase pressure drop and heat transfer in a rotor-assembled strand inserted tube were measured using water as the working fluid.Experiment using a smooth tube was carried out to calibrate the experimental sy...The single-phase pressure drop and heat transfer in a rotor-assembled strand inserted tube were measured using water as the working fluid.Experiment using a smooth tube was carried out to calibrate the experimental system and the data reduction method.In the experiment,fixed mounts were used to eliminate the entrance effect. The experimental results of smooth tube show that employment of fixed mounts leads to a visible bias of friction factor at relative low Reynolds numbers,although it does not significantly affect the Nusselt numbers.The measured data of inserted tube reveal that rotor-assembled strand can significantly improve heat transfer with the Nusselt number increased by 101.6%-106.6%and the overall heat transfer coefficient increased by 58.1%-67.4%within the Reynolds number range of 20000 to 36000.Meanwhile,friction factor increases by 52.2%-84.2%within the same Reynolds number range.The correlations of Nusselt number and friction factor as function of the Reynolds number and Prandtl number were determined through multivariant linear normal regression.展开更多
文摘介绍了当前工程子午胎的市场需求状况和国内外的生产技术水平,指出理论分析技术应当在提高工程子午胎的质量方面发挥重要作用。进而回顾了理论分析技术在轮胎中的应用及其衍生的轮胎设计理论。分析了理论分析技术在轮胎应用中的发展趋势。介绍了子午线轮胎"动态仿真综合分析系统CASDS(Comprehensive Analysis System by Dynamic Simulation)"的技术路线和技术成熟程度,并简要介绍了整胎"Semi-Tweel"模型。国内轮胎企业尤其是投资工程子午胎项目的企业应重视理论分析技术重要价值。
基金Supported by the National High Technology Research and Development Program of China(2007BAF13B01)
文摘The single-phase pressure drop and heat transfer in a rotor-assembled strand inserted tube were measured using water as the working fluid.Experiment using a smooth tube was carried out to calibrate the experimental system and the data reduction method.In the experiment,fixed mounts were used to eliminate the entrance effect. The experimental results of smooth tube show that employment of fixed mounts leads to a visible bias of friction factor at relative low Reynolds numbers,although it does not significantly affect the Nusselt numbers.The measured data of inserted tube reveal that rotor-assembled strand can significantly improve heat transfer with the Nusselt number increased by 101.6%-106.6%and the overall heat transfer coefficient increased by 58.1%-67.4%within the Reynolds number range of 20000 to 36000.Meanwhile,friction factor increases by 52.2%-84.2%within the same Reynolds number range.The correlations of Nusselt number and friction factor as function of the Reynolds number and Prandtl number were determined through multivariant linear normal regression.
基金Supported by the National Natural Science Foundation of Beijing （3102023） and the National Science and Technology Support Plan Project （2011BAA04B02）.
