Overall
- Language
- korean
- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
- Publication history
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Received August 29, 2024
Revised September 22, 2024
Accepted October 2, 2024
Available online February 1, 2025
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Most Cited
KTX 열차 노즐 유량 및 형상 별 유량비율에 따른 차륜의 온도 해석
Analysis of Wheel Temperature According to Ktx Train Nozzle Flow Rate and Flow Rate Ratio by Nozzle
https://doi.org/10.9713/kcer.2025.63.1.65
Abstract
본 연구에서는 CFD 코드를 활용하여 ktx 객차 내부의 따뜻한 공기(301K)를 열차 차체 하부 쪽과 선로 부에 공급하는
방안을 적용하고, 이러한 공기의 유동특성을 전산유체역학적으로 해석을 수행하는 것을 목적으로 하였다. 선로 부의
공기의 유동에 따른 예빙 및 결빙 특성을 보다 정밀히 예측하기 위해 노즐 유량에 따른 온도해석, 노즐 별 유량비율에
따른 차륜의 온도변화를 해석하였다. ktx열차의 시속은 300 km/h로 가정하였고, 외부온도는 253K로 설정하였다. 한편, 노
즐(nozzle)의 개수는 4개가 설치된 경우로 가정하였고, 각 노즐을 통해 차륜 주위로 공급되는 공기온도는 301 K로 설
정하였다. 주요 연구결과는 다음과 같다. 첫째, 본 연구의 해석조건인 총 6개 조건의 유량에서 모든 위치의 차륜에 적
용되는 최소 유량은 3.33 m3/sec 것으로 나타났다. 둘째, 결빙을 방지할 수 있는 온도인 273 K이상이 유지될 수 있는
최소 유량인 3.33 m3/sec를 기준으로 노즐 별 유량비율에 따른 차륜의 온도변화를 해석한 결과, 유량비율이 1:1:1 인
조건일 때 노즐 위치 4곳 모두에서 결빙을 방지할 수 있는 것으로 나타났다.
In this study, the purpose of this study was to apply a method of supplying warm air (301 K) inside the ktx
passenger car to the lower part of the train body and the track using the CFD code, and to perform a computational
hydrodynamic analysis of these air flow characteristics. In order to more accurately predict the pre-ice and freezing
characteristics according to the flow of air in the track, temperature analysis according to the nozzle flow rate and temperature
change of the wheel according to the flow rate ratio of each nozzle were analyzed. The ktx train speed was assumed to
be 300 km/h and the external temperature was set to 253 K. On the other hand, it was assumed that the number of
nozzles was four, and the air temperature supplied around the wheel through each nozzle was set to 301 K. The main
research results are as follows. First, it was found that the minimum flow rate applied to wheels at all locations was
3.33 m3/sec at a total flow rate of 6 conditions, which is the interpretation condition of this study. Second, based on the
minimum flow rate of 3.33 m3/sec, which is the minimum flow rate that can be maintained above 273 K, the
temperature to prevent freezing, it was found that freezing could be prevented in all four nozzle locations when the flow
rate was 1:1:1.
References
W., Kang, D. H. and Kim, Y. H., “Operator Requirement Analysis
of the Double Deck High Speed Train,” 2014 Spring Conference
of the Korean Society for Railway, 1034-1039(2014).
2. Ogretim, E., Huebsch, W. and Shinn, A., “Aircraft Ice Accretion
Prediction Based on Neural Networks,” Journal of Aircraft,
43(1), 233-240(2006).
3. Cao, L., Andrew, K. J., Vinod, K. S., Wu, J. and Gao, D., “Anti-
Icing Superhydrophobic Coatings,” Langmuir, 25(21), 12444-
12448(2009).
4. Guo, P., Zheng, Y., Wen, M., Song, C., Lin, Y. and Jian, L., “Icephobic/
Anti-Icing Properties of Micro/Nanostructured,” Advanced
Materials 24, 2642-2648(2012).
5. Gwon, H. B., “A Study on the Running Speed Control According
to the Snow Accretion Under the Car Body During the Heavy
Snow,” J. Korean Soc. Railway, 18, 26-43(2015).
6. Gwon, H. B., Nam, S. W., Kim, D. S., Lee, I. W. and Han, J. S.,
“Research on Countermeasures for Ballast-flying Phenomenon
by Accreted Snow/ice from High-speed Trains,” J. Korean Soc.
Railway, 26, 229-234(2004).
7. Ji, Y., Dan, K. and Lee, C., “A Mat for Preventing Flying Ballast
in the Rail Road, Korean Patent 2003646470000,” 2004.
8. Han, K. I., Lee, A. H. and Cho, D. H., “A Study on Snow Melting
System for the Anti-freezing Testing Road,” Journal of the
Korea Society For Power System Engineering, 10(1), 34-40(2006).
9. Li, Q., Guo, Z., Shu, Z. L. and Yi, D., “On-line Anti-icing Technology
for Catenary of Electrified Railway,” J. China Railw. Soc.,
35(10), 46-51(2013).
10. Kim, H. Y., Kang, D. H. and Choi, K. W., “Evaluation on Applicability
of Paint-Type Exothermic Coating Technology based on
Nano Materials to Railway Site in Winter Season,” Journal of
Korean Society for Urban Railway, 7(4), 545-552(2019).
11. Cho, H. S., “Study on the Fabrication of Surface Heating Panel
Using SiC Ceramics,” Journal of Korea Institute of Information,
Electronics, and Communication Technology, 9(6), 604-608(2016).
12. Yang, K., Cho, K., Im, K. and Kim, S., “Temperature Maintenance
of an ITO Nanoparticle Film Heater,” Journal of IKEEE,
20(2), 171-173(2016).
13. Kawashima, K., “Experimental Studies on Ballast-flying Phenomenon
Caused by Dropping of Accreted Snow/Ice From Highspeed
Trains,” RTRI Report, 18(8), 1-135(2003).
14. Cinieri, E. and Fumi, A., “Deicing of The Contact Lines of the
High-Speed Electric Railways: Deicing Configurations. Experimental
Test Results,” IEEE Transactions on Power Delivery, 29(6),
2580-2587(2014).