航天推进技术研究院主办
[1]游尔胜,李依依,王甜蜜,等.有效导热系数模型在核热推进反应堆的应用[J].火箭推进,2024,50(04):94-102.[doi:10.3969/j.issn.1672-9374.2024.04.009]
YOU Ersheng,LI Yiyi,WANG Tianmi,et al.Effective thermal conductivity model applied in pellet bed reactors for nuclear thermal propulsion[J].Journal of Rocket Propulsion,2024,50(04):94-102.[doi:10.3969/j.issn.1672-9374.2024.04.009]
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YOU Ersheng,LI Yiyi,WANG Tianmi,et al.Effective thermal conductivity model applied in pellet bed reactors for nuclear thermal propulsion[J].Journal of Rocket Propulsion,2024,50(04):94-102.[doi:10.3969/j.issn.1672-9374.2024.04.009]
有效导热系数模型在核热推进反应堆的应用
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
50
期数:
2024年04期
页码:
94-102
栏目:
目次
出版日期:
2024-08-25
- Title:
- Effective thermal conductivity model applied in pellet bed reactors for nuclear thermal propulsion
- 文章编号:
- 1672-9374(2024)04-0094-09
- Keywords:
- effective thermal conductivity; model application; pellet bed reactors; nuclear thermal propulsion
- 分类号:
- TL99
- 文献标志码:
- A
- 摘要:
- 核热推进反应堆一般选用氢气做工质,通过堆芯燃料颗粒加热到高温,以实现较高的发动机推力和比冲。基于美国核热推进火箭发动机的典型堆芯设计方案,在高温气冷堆球床有效导热系数模型的基础上,对更小直径的燃料颗粒与更高温度的氢气工质组成的颗粒床混合介质进行了初步计算,获得了燃料种类、颗粒直径、孔隙率等关键参数对堆芯导热能力的影响规律。同时,考虑到燃料颗粒采用多种材料复合而成的包覆型结构,采用均匀化方法对不同材料的基础热物性进行了等效计算,从而为有效导热系数模型提供固体域平均导热参数。从计算结果来看,颗粒直径和孔隙率对有效导热系数的影响更大,特别是高温条件下辐射换热作用占主导,使得材料自身导热系数的贡献很小。
- Abstract:
- Nuclear thermal propulsion(NTP)is a new-type nuclear reactor application which chooses hydrogen gas as the working medium, heated by fuel pellets in the reactor core to extremely high temperature, so as to achieve huge thrust and high specific impulse. Based on the typical design of reactor core in American NTP rocket engine programs, the effective thermal conductivity model of high temperature gas-cooled reactors was used and preliminary applied, for the analysis of the pellet bed mixed with smaller fuel particles and higher temperature hydrogen gas. The influences of fuel type, pellet diameter and pellet bed porosity on the thermal conductivity of the reactor core were also obtained in this paper. Meanwhile, considering that the fuel pellet was usually coated by multi-layers with different materials, the homogenization method was used for equivalent calculation in thermal properties of these materials, aimed to provide the average thermal conductivity parameters of solid domain for the effective thermal conductivity model. According to the calculation results, the pellet diameter and pellet bed porosity have a greater impact on the effective thermal conductivity, relative to the components thermal conductivity, especially under high temperature conditions that the radiation heat transfer is dominant.
参考文献/References:
[1] 张泽, 薛翔, 王园丁, 等. 空间核动力推进技术研究展望[J]. 火箭推进, 2021, 47(5): 1-13.
ZHANG Z, XUE X, WANG Y D, et al. Prospect of space nuclear power propulsion technology[J]. Journal of Rocket Propulsion, 2021, 47(5): 1-13.
[2]游尔胜, 石磊, 郑艳华, 等. 球床堆在空间核动力系统中的应用[J]. 原子能科学技术, 2015, 49(S1): 75-80.
YOU E S, SHI L, ZHENG Y H, et al. Application of pellet bed reactor in space nuclear power system[J]. Atomic Energy Science and Technology, 2015, 49(S1): 75-80.
[3]IAEA. The role of nuclear power and nuclear propulsion in the peaceful exploration of space[R]. Vienna: International Atomic Energy Agency, 2005.
[4]ROBBINS W. An historical perspective of the NERVA nuclear rocket engine technology program[C]//Conference on Advanced SEI Technologies. Reston, Virginia: AIAA, 1991.
[5]FINSETH J L. Overview of ROVER engine tests final report[R]. Huntsville, AL: Marshall Space Flight Center, 1991.
[6]PONOMAREV-STEPNOI N N, KUKHARKIN N E, USOV V A. Russian space nuclear power and nuclear thermal propulsion systems[J]. Nuclear News, 2000, 76(13): 37-46.
[7]ASKER J R. Particle bed reactor central to SDI nuclear rocket project[J]. Aviation Week and Space Technology, 1991, 134: 18-25.
[8]POWELL J, MAISE G, PANIAGUA J. Pluto orbiter/lander/sample return missions using the MITEE nuclear engine[C]//Aerospace Conference. Big Sky, MT: IEEE, 2003.
[9]EI-GENK M S, MORLEY N J, HALOULAKOS V E B. Pellet bed reactor for nuclear thermal propelled vehicles[Z]. 1991.
[10]EL-GENK M S. Deployment history and design considerations for space reactor power systems[J]. Acta Astronautica, 2009, 64(9): 833-849.
[11]SCHRIENER T M, EL-GENK M S. Effects of decreasing fuel enrichment on the design of the Pellet Bed Reactor(PeBR)for lunar outposts[J]. Progress in Nuclear Energy, 2018, 104: 288-297.
[12]游尔胜, 佘顶, 陈福冰, 等. 小型化气冷球床堆方案设计与应用研究[J]. 原子能科学技术, 2017, 51(7): 1167-1172.
YOU E S, SHE D, CHEN F B, et al. Conceptual design and application research on small gas-cooled pebble bed reactor[J]. Atomic Energy Science and Technology, 2017, 51(7): 1167-1172.
[13]吉宇, 毛晨瑞, 孙俊, 等. 核热火箭发动机系统循环方案分析与设计[J]. 火箭推进, 2022, 48(1): 14-21.
JI Y, MAO C R, SUN J, et al. Analysis and design of system cycle for nuclear thermal rocket engine[J]. Journal of Rocket Propulsion, 2022, 48(1): 14-21.
[14]王浩泽, 左安军, 霍红磊, 等. 110 kN核热火箭发动机系统方案选取与参数优化研究[J]. 原子能科学技术, 2019, 53(1): 30-37.
WANG H Z, ZUO A J, HUO H L, et al. System design selection and parametric optimization analysis of 110 kN nuclear thermal rocket engine[J]. Atomic Energy Science and Technology, 2019, 53(1): 30-37.
[15]SELCOW E C, DAVIS R E, PERKINS K R, et al. Assessment of the use of H2, CH4, NH3 and CO2 as NTR propellants[C]//AIP Conference. Albuquerque: AIP, 1992.
[16]ASSAEL M J, ASSAEL J, HUBER M L, et al. Correlation of the thermal conductivity of normal and parahydrogen from the triple point to 1 000 K and up to 100 MPa[J]. Journal of Physical and Chemical Reference Data, 2011, 40(3): 33-101.
[17]BAUER R, SCHLUNDER E U. Effective radial thermal conductivity of packings in gas flow[J]. International Chemical Engineering, 1978, 18(2): 181-204.
[18]YOU E S, SUN X M, CHEN F B, et al. An improved prediction model for the effective thermal conductivity of compact pebble bed reactors[J]. Nuclear Engineering and Design, 2017, 323: 95-102.
备注/Memo
收稿日期:2023- 04- 18修回日期:2023- 09- 04
基金项目:国家自然科学基金联合基金(U1967203)
作者简介:游尔胜(1992—),男,博士,助理研究员,研究领域为新型核动力技术及应用。
更新日期/Last Update:
1900-01-01