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A review of recent experimental investigations and theoretical analyses for pulsating heat pipes
Xin TANG, Lili SHA, Hua ZHANG, Yonglin JU
《能源前沿(英文)》 2013年 第7卷 第2期 页码 161-173 doi: 10.1007/s11708-013-0250-1
关键词: pulsating heat pipe (PHP) flow visualization nanofluids nonlinear analysis
Experimental investigations on operating characteristics of a closed loop pulsating heat pipe
Yu WANG
《能源前沿(英文)》 2015年 第9卷 第2期 页码 134-141 doi: 10.1007/s11708-015-0354-x
关键词: closed loop pulsating heat pipe thermal performance operation limit thermography
Major applications of heat pipe and its advances coupled with sorption system: a review
Yang YU, Guoliang AN, Liwei WANG
《能源前沿(英文)》 2019年 第13卷 第1期 页码 172-184 doi: 10.1007/s11708-019-0610-6
关键词: heat pipe sorption system heat transfer solid sorption heat pipe
Heat-spreading analysis of a heat sink base embedded with a heat pipe
B. V. BORGMEYER, H. B. MA,
《能源前沿(英文)》 2010年 第4卷 第2期 页码 143-148 doi: 10.1007/s11708-010-0013-1
A space power system of free piston Stirling generator based on potassium heat pipe
Mingqiang LIN, Jian MOU, Chunyun CHI, Guotong HONG, Panhe GE, Gu HU
《能源前沿(英文)》 2020年 第14卷 第1期 页码 1-10 doi: 10.1007/s11708-019-0655-6
关键词: free piston Stirling generator (FPSG) potassium heat pipe power system energy conversion
Design and analyses of open-ended pipe piles in cohesionless soils
Yuan GUO,Xiong (Bill) YU
《结构与土木工程前沿(英文)》 2016年 第10卷 第1期 页码 22-29 doi: 10.1007/s11709-016-0314-5
Group-based multiple pipe routing method for aero-engine focusing on parallel layout
《机械工程前沿(英文)》 2021年 第16卷 第4期 页码 798-813 doi: 10.1007/s11465-021-0645-3
关键词: multiple pipe routing optimization algorithm aero-engine pipe grouping parallel layout
基于平板热管的新型直膨式辐射可调节供暖末端 Article
吴一凡, 孙弘历, 段梦凡, 林波荣, 赵恒昕, 刘兆鸿
《工程(英文)》 2023年 第20卷 第1期 页码 192-207 doi: 10.1016/j.eng.2021.09.019
建筑供暖电气化是实现碳中和目标的有效途径。作为一种清洁和可持续的电气化供暖技术,空气源热泵被广泛应用于缺乏集中供暖的地区。然而,现有末端形式存在难以同时实现间歇性和舒适性,且作为主要构件尚未较好地与空气源热泵匹配等问题。因此,本研究提出了一种与空气源热泵结合的新型辐射可调节供暖末端,以实现电气化节能减碳、间歇性和更好的热舒适性。针对辐射供暖末端目前存在三个主要问题,分别是峰值供热量受限、可调节性受限以及难以与空气源热泵结合,本文通过改进末端结构设计(改进A~E)提供了有效解决方案。研究结果表明,新末端能够将峰值供热量提升23.6%,并为使用者提供从10.1%到30.9%的可调辐射比。在此基础上,巧妙地借助平板热管减少了原有直膨式辐射供暖末端的制冷剂管路长度,进而改善了供暖末端的稳定性(利于回油)、间歇性(降低热惯性)和安全性(降低制冷剂泄漏风险)。此外,本文基于新末端提出了一种新的分阶段运行策略,可进一步提升末端的可调节性。本研究可以为电气化供暖助力建筑低碳提供一定参考。
A review of nondestructive examination technology for polyethylene pipe in nuclear power plant
Jinyang ZHENG, Yue ZHANG, Dongsheng HOU, Yinkang QIN, Weican GUO, Chuck ZHANG, Jianfeng SHI
《机械工程前沿(英文)》 2018年 第13卷 第4期 页码 535-545 doi: 10.1007/s11465-018-0515-9
Polyethylene (PE) pipe, particularly high-density polyethylene (HDPE) pipe, has been successfully utilized to transport cooling water for both non-safety- and safety-related applications in nuclear power plant (NPP). Though ASME Code Case N755, which is the first code case related to NPP HDPE pipe, requires a thorough nondestructive examination (NDE) of HDPE joints. However, no executable regulations presently exist because of the lack of a feasible NDE technique for HDPE pipe in NPP. This work presents a review of current developments in NDE technology for both HDPE pipe in NPP with a diameter of less than 400 mm and that of a larger size. For the former category, phased array ultrasonic technique is proven effective for inspecting typical defects in HDPE pipe, and is thus used in Chinese national standards GB/T 29460 and GB/T 29461. A defect-recognition technique is developed based on pattern recognition, and a safety assessment principle is summa-rized from the database of destructive testing. On the other hand, recent research and practical studies reveal that in current ultrasonic-inspection technology, the absence of effective ultrasonic inspection for large size was lack of consideration of the viscoelasticity effect of PE on acoustic wave propagation in current ultrasonic inspection techno-logy. Furthermore, main technical problems were analyzed in the paper to achieve an effective ultrasonic test method in accordance to the safety and efficiency requirements of related regulations and standards. Finally, the development trend and challenges of NDE test technology for HDPE in NPP are discussed.
关键词: polyethylene pipe nuclear power plant ultrasonic inspection nondestructive testing safety assessment
Calculation method of load distribution on pipe threaded connections under tension load
Shoujun CHEN, Lianxin GAO, Qi AN
《机械工程前沿(英文)》 2011年 第6卷 第2期 页码 241-248 doi: 10.1007/s11465-011-0219-x
This paper presents a new calculation method that can calculate the load distribution on pipe threaded connections under tension load. On the basis of elastic mechanics, the new method was developed by analyzing each thread tooth, and a new deformation and covariant equation by making a mechanics analysis on each thread tooth was obtained. Compared with the traditional method proposed by the previous references, the new deformation and covariant equation could be used to describe the relation between the previous and the next thread tooth. By applying the new method on the sample of P-110S pipe threaded connection, the obtained results show that the load on thread tooth mainly concentrates on the four or five threads engaged and the middle teeth were not utilized well to bear the loads. The model offers a new way to calculate the loads carried on the thread teeth under tension load.
关键词: load distribution calculation method pipe threaded connections tension load
NC flame pipe cutting machine tool based on open architecture CNC system
Xiaogen NIE, Yanbing LIU
《机械工程前沿(英文)》 2009年 第4卷 第2期 页码 147-152 doi: 10.1007/s11465-009-0025-x
关键词: flame pipe cutting flame incision tracks CNC open architecture CNC system
Branch-pipe-routing approach for ships using improved genetic algorithm
Haiteng SUI,Wentie NIU
《机械工程前沿(英文)》 2016年 第11卷 第3期 页码 316-323 doi: 10.1007/s11465-016-0384-z
Branch-pipe routing plays fundamental and critical roles in ship-pipe design. The branch-pipe-routing problem is a complex combinatorial optimization problem and is thus difficult to solve when depending only on human experts. A modified genetic-algorithm-based approach is proposed in this paper to solve this problem. The simplified layout space is first divided into three-dimensional (3D) grids to build its mathematical model. Branch pipes in layout space are regarded as a combination of several two-point pipes, and the pipe route between two connection points is generated using an improved maze algorithm. The coding of branch pipes is then defined, and the genetic operators are devised, especially the complete crossover strategy that greatly accelerates the convergence speed. Finally, simulation tests demonstrate the performance of proposed method.
关键词: branch pipe ship industry piping system optimization algorithm
Assessment of glass fiber-reinforced polyester pipe powder in soil improvement
《结构与土木工程前沿(英文)》 2021年 第15卷 第3期 页码 742-753 doi: 10.1007/s11709-021-0732-x
关键词: shallow foundation sandy soil bearing capacity soil improvement pipe powder
Dynamic prediction of moving trajectory in pipe jacking: GRU-based deep learning framework
《结构与土木工程前沿(英文)》 页码 994-1010 doi: 10.1007/s11709-023-0942-5
关键词: dynamic prediction moving trajectory pipe jacking GRU deep learning
Fictitious soil pile model for dynamic analysis of pipe piles under high-strain conditions
《结构与土木工程前沿(英文)》 页码 915-934 doi: 10.1007/s11709-023-0907-8
关键词: fictitious soil pile soil plug pipe piles high-strain dynamic analysis one-dimensional wave theory pile dynamics
标题 作者 时间 类型 操作
A review of recent experimental investigations and theoretical analyses for pulsating heat pipes
Xin TANG, Lili SHA, Hua ZHANG, Yonglin JU
期刊论文
Experimental investigations on operating characteristics of a closed loop pulsating heat pipe
Yu WANG
期刊论文
Major applications of heat pipe and its advances coupled with sorption system: a review
Yang YU, Guoliang AN, Liwei WANG
期刊论文
Heat-spreading analysis of a heat sink base embedded with a heat pipe
B. V. BORGMEYER, H. B. MA,
期刊论文
A space power system of free piston Stirling generator based on potassium heat pipe
Mingqiang LIN, Jian MOU, Chunyun CHI, Guotong HONG, Panhe GE, Gu HU
期刊论文
A review of nondestructive examination technology for polyethylene pipe in nuclear power plant
Jinyang ZHENG, Yue ZHANG, Dongsheng HOU, Yinkang QIN, Weican GUO, Chuck ZHANG, Jianfeng SHI
期刊论文
Calculation method of load distribution on pipe threaded connections under tension load
Shoujun CHEN, Lianxin GAO, Qi AN
期刊论文
NC flame pipe cutting machine tool based on open architecture CNC system
Xiaogen NIE, Yanbing LIU
期刊论文