Comparison of the heat transfer performance and friction characteristics between fixed and rotating turbine-type swirl generators fitted in a small circular tube

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Duangthongsuk W., Wongwises S.

ผู้เผยแพร่: Elsevier

ปีที่เผยแพร่ (ค.ศ.): 2013

วารสาร: Experimental Thermal and Fluid Science (0894-1777)

Volume number: 50

หน้าแรก: 222

หน้าสุดท้าย: 228

จำนวนหน้า: 7

นอก: 0894-1777

eISSN: 1879-2286

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880738115&doi=10.1016%2fj.expthermflusci.2013.04.007&partnerID=40&md5=6f7137d5e4f617bb4bae03ddf633f728

ภาษา: English-Great Britain (EN-GB)

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บทคัดย่อ

This paper is a continuation of the authors' previous work [W. Duangthongsuk, S. Wongwises, An experimental investigation of the heat transfer and pressure drop characteristics of a circular tube fitted with rotating turbine-type swirl generators, Exp. Therm. Fluid Sci. 45, (2013), 8-15.]. Swirl generators inserted into a conventional smooth tube is an innovative way to increase the thermal performance of the heat exchangers. The effect of the free rotation of a swirl device on the thermal performances and friction behaviors are investigated experimentally. Five turbine-type swirl generators with and without free rotation are inserted and installed equally distant along the test section. In the present study, DI water is used as a testing fluid and flows under a turbulent flow regime. A common stainless steel tube with an OD of 10. mm, ID of 9.2. mm, and length of 2.3. m is used as the test tube. A DC power supply is used to supply the heat load to the test section in order to meet the constant heat flux boundary condition. The data for a common smooth tube are compared with the data for fixed (FTSG) and freely rotating turbine type swirl generator (RTSG). The measured data illustrate that the heat transfer performance of the tube with RTSG inserts is 6.3% and 56% higher than that of the FTSG insert and the conventional smooth tube, respectively. Moreover, the heat transfer coefficient significantly increases when the fluid flows pass the RTSG and FTSG inserts. However, inserting the RTSG and FTSG into the common smooth tube results in an increase of the pressure drop. The tube with RTSG inserts gives the lowest pressure drop. ฉ 2013 Elsevier Inc.

คำสำคัญ

Swirl generator inserts