Intensification of Heat Transfer Processes in the Low Temperature Short Heat Pipes with Laval Nozzle Formed Vapour Channel
American Journal of Modern Physics
Volume 7, Issue 1, January 2018, Pages: 48-61
Received: Dec. 6, 2017; Accepted: Dec. 24, 2017; Published: Jan. 11, 2018
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Author
Arkady Vladimirovich Seryakov, Research Laboratory, LLC Research and Development Company “Rudetransservice”, Veliky Novgorod, Russia
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Abstract
The results of flow studies of moist vapour in Laval-liked vapour channels of short linear heat pipes (HPs) are presented. The increase in heat transfer coefficient of short linear HPs, intended for creation the cooling systems of heat-stressed designs of spacecraft is carried out by making the HPs vapour channel forms of the Laval-liked nozzle. Comparison of the heat transfer coefficients of short HPs with the standard cylindrical vapour channel and the channel, made in the Laval nozzle form with the equality of all dimensions, flat evaporator shows that the HPs with the Laval-liked nozzle vapour channel exceeds the heat transfer characteristics of the standard HPs with a cylindrical vapour channel under high thermal loads. The study of the flow and condensation in such shaped vapour channels of the short HPs at high thermal loads gives an opportunity to analyze in detail the advantages of using such HPs. Capacitive sensors are additionally installed in cooled top covers of the HPs, and electromagnetic pulses with a frequency of 100 kHz were supplied to them from the external generator. At heating the HPs evaporator, starting from a certain thermal power threshold value, electromagnetic pulses became modulated. It is related with the formations of the boiling process in the capillary-porous evaporator and large amount of vapour over it and its discontinuous distribution. An analytical and numerical evaluation are applied to study the duration of the occurring pulsations, and the analytical results are compared with numerical and experimentally obtained values of the pulsations periods.
Keywords
Heat Pipes, Laval Nozzle, Pulsation, Heat Transfer Coefficient
To cite this article
Arkady Vladimirovich Seryakov, Intensification of Heat Transfer Processes in the Low Temperature Short Heat Pipes with Laval Nozzle Formed Vapour Channel, American Journal of Modern Physics. Vol. 7, No. 1, 2018, pp. 48-61. doi: 10.11648/j.ajmp.20180701.16
Copyright
Copyright © 2018 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
References
[1]
Akachi H. Structure of Heat Pipe. US patent 1990. № 4921041.
[2]
Tong B. Y., Wong T. N., Ooi K. T. Closed-loop pulsating heat pipe//Applied Thermal Engineering. 2001, v 21, № 18, pp. 1845-1862.
[3]
Naik R., Varadarajan V., Pundarika G. and Narasimha K. R. Experimental Investigation and Performance Evaluation of a Closed Loop Pulsating Heat Pipe// Journal of Applied Fluid Mechanics, 2013. Vol. 6, №. 2, pp. 267-275.
[4]
Bertossi R., Romestant C., Ayel V., Bertin Y. A theoretical study and review on the operational limitations due to vapour flow in heat pipes. Front heat pipes 3 (2012) 023001.
[5]
Bandyopadhyay A., Majumdar A. Modeling of compressible flow with friction and heat transfer using the generalized fluid system simulation program (GFSSP) //Thermal Fluid Analysis Workshop (TFAWS) by NASA Glenn Research Center and Corporate College, Cleveland, September 10-14, 2007. pp. 1-14.
[6]
Zhang Y. and A. Faghri, 2008, Advances and unsolved issues in pulsating heat pipes // Heat Transfer Engineering 2008, v. 29 (1), pp. 20-44.
[7]
Qu W., Ma H. B. Theoretical Analysis of Startup of a Pulsating Heat Pipe, International Journal of Heat and Mass Transfer, vol. 50, pp 2309-2316, 2007.
[8]
Kutz M. Pulsating Heat Pipes. Mechanical Engineers; Handbook, Energy and Power, Third Edition, Book 4, Chapter 9, 2006.
[9]
H R Deng et al Experimental investigation on a pulsating heat pipe with hydrogen 2015 IOP Conf. Ser.: Mater. Sci. Eng. 101 012065.
[10]
Creatini F. et al. Pulsating Heat pipe Only for Space (PHOS): results of the REXUS 18 sounding rocket Campaign 2015 J. Phys.: Conf. Ser. 655 012042.
[11]
Taft B. S., Williams A. D., Drolen B. L. Review of Pulsating Heat Pipe Working Fluid Selection // Journal of Thermophysics and Heat Transfer, 2012. v. 26, No. 4, pp. 651-656.
[12]
Seryakov A. V. Velocity measurements in the vapour channel of low temperature range heat pipes// International Journal of Engineering Research & Technology 2013, v. 2, № 8, pp. 1595–1603.
[13]
Gupta AK, Lilley, D., N. Sayred. Swirling flow. New York: Wiley. 1987. 588 p.
[14]
Seryakov A. V. Pulsation flow in the vapour channel of low temperature range heat pipes// Direct Research Journal of Engineering and Information Technology 2014, v. 2 (1), pp. 1-10.
[15]
Seryakov A. V. Pulsation flow in the vapour channel of short low temperature range heat pipes // International Journal on Heat and Mass Transfer Theory and Application 2014, v. 2, № 2, pp. 40-49.
[16]
Seryakov A. V., Ananiev V. I., Orlov A. V. Condensation research in the short low-temperature range heat pipes.//Proceedings of the 9th Minsk International Seminar of Heat Pipes, Heat Pumps, Refrigerators, Power Sources. Minsk, Belarus, 7-10 September 2015, v 2. p. 168-176.
[17]
Seryakov A. V., Ananiev V. I. Condensation research in the short low-temperature range heat pipes.//Proceedings of the VIII International Symposium on Turbulence, Heat and Mass Transfer. Sarajevo, Bosnia and Herzegovina, September 15-18 2015. Begell House Inc. p. 693-696.
[18]
Patent № 2431101 RF, F 28D 15/00/ Method of filling heat pipes. Seryakov A. V. Published 10. 10. 2011. Bulletin No. 28.
[19]
Utility model patent No. 152108 / Capacitance sensor for determination of a fluid layer thickness / Seryakov A. V. Published on 27.06.2015. Bulletin No. 18/2015.
[20]
Seryakov A. V., Konkin А. V., Belousov V. K. Application of a jet steam nozzle in medium-temperature range heat pipes // Bulletin of Siberian State Aerospace University. 2012. Issue 1 (41), pp. 142-147.
[21]
Steinhart J. S., Hart S. R. Calibration curves for thermistors // Deep Sea Research and Oceanographic Abstracts. 1968, v. 15, № 4, p. 497-503.
[22]
CORNERSTONE SENSORS. A, B, C Coefficients for Steinhart-Hart Equation. Temperature Sensors for Health, Science and Industry. 2010. 2p. California 92083. USA.
[23]
Seryakov A. V. Temperature measurement with thermistors // Bulletin of Siberian State Aerospace University 2013, Issue 1 (47), pp. 167-172.
[24]
Seryakov A. V. Improving the accuracy of temperature measurement with thermistors // Sensors and Systems 2013, №1, pp. 38-42.
[25]
Seryakov A. V. A new method for temperature measurement using thermistors// International Journal of Engineering Research & Technology 2013, v. 2, № 7, pp. 444–454.
[26]
Seryakov A. V. A universal method for temperature measurement using thermistors// National Journal of Engineering and Technology Research. Academia Publishing. 2013, v. 1 (1), pp. 014-020.
[27]
Faghri A. Heat Pipe Science and Technology. 1995. Washington USA, Taylor and Francis.
[28]
Vargaftic N. B. Spravochnick po teplophizicheskim svoistvam gasov i zhidkostey. Moscow: Publishing house of Physico - Mathematical literature. 1963. 708p.
[29]
Tables of physical values. Guide under the editorship of Kikoin I. K., the member of Academy of Science. Moscow: Atomizdat 1976. 1008 p.
[30]
Lee R., Reges J., Almenas K. Size and number density change of droplet populations above front during reflood // International Journal of Heat and Mass Transfer. 1984. v. 27. N4. p. 573-585.
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