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Journal of Enhanced Heat Transfer

Publicou 8 edições por ano

ISSN Imprimir: 1065-5131

ISSN On-line: 1563-5074

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 2.3 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.8 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.2 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00037 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.6 SJR: 0.433 SNIP: 0.593 CiteScore™:: 4.3 H-Index: 35

Indexed in

COMPENSATION OF THREE-DIMENSIONAL HEAT CONDUCTION INSIDE WALL IN HEAT TRANSFER MEASUREMENT OF DIMPLED SURFACE BY USING TRANSIENT TECHNIQUE

Volume 19, Edição 4, 2012, pp. 331-341
DOI: 10.1615/JEnhHeatTransf.2012003016
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RESUMO

The transient technique using infrared thermography or liquid crystal has been widely used for measuring the distribution of local heat transfer coefficients. In this technique, wall surface temperature is measured, and the heat transfer coefficient is calculated so as to accord the measured temperature with the theoretical solution of a one-dimensional heat conduction problem. In actual cases of complicated surface geometry, however, three-dimensional heat conduction, caused by the three-dimensionality of the wall surface and the distribution of heat transfer coefficient, occurs in the wall. In this study, the heat transfer enhancement on the hemispherically dimpled surface was measured with an infrared camera, while the three-dimensional heat conduction in the wall was numerically calculated. In the compensation process, modification of the heat transfer coefficient was repeated until the numerical result agreed with the measured surface temperature. The present results showed that the heat transfer coefficient near the dimple edge was overrated, while that within the cavity was underrated. The maximum error induced by the three-dimensional heat conduction was +50% on the leading edge of the dimple, and the error in the other area was about −20% at most. At the dimple edge, the convex geometry increased the surface area where the heat flew into the wall, and consequently the temperature rise became larger than the flat part. On the other hand, within the dimple, the concave geometry formed the radially expanding heat conduction area, and the temperature became lower. The principal factor contributing to the error of the measurement is the three-dimensionality of the surface.

CITADO POR
  1. Sathyanarayanan Srisudarshan Krishna, Ramachandran Saiprashanth Gomatam, Shih Tom I-Ping, Time-Accurate CFD Conjugate Analysis of Transient Measurements of the Heat-Transfer Coefficient, 53rd AIAA Aerospace Sciences Meeting, 2015. Crossref

  2. Murata Akira, Yano Kohta, Hanai Masaki, Saito Hiroshi, Iwamoto Kaoru, Arrangement effects of inclined teardrop-shaped dimples on film cooling performance of dimpled cutback surface at airfoil trailing edge, International Journal of Heat and Mass Transfer, 107, 2017. Crossref

  3. Sathyanarayanan Srisudarshan Krishna, Shih Tom I.-P., Time-Accurate Conjugate Analysis of Transient Measurements of Heat Transfer Coefficients, Journal of Thermophysics and Heat Transfer, 31, 3, 2017. Crossref

  4. Murata Akira, Nishida Satomi, Saito Hiroshi, Iwamoto Kaoru, Okita Yoji, Nakamata Chiyuki, Effects of Surface Geometry on Film Cooling Performance at Airfoil Trailing Edge, Journal of Turbomachinery, 134, 5, 2012. Crossref

  5. Saha Sujoy Kumar, Ranjan Hrishiraj, Emani Madhu Sruthi, Bharti Anand Kumar, Internally Finned Tubes and Spirally Fluted Tubes, in Heat Transfer Enhancement in Externally Finned Tubes and Internally Finned Tubes and Annuli, 2020. Crossref

  6. Saha Sujoy Kumar, Ranjan Hrishiraj, Emani Madhu Sruthi, Bharti Anand Kumar, Fouling on Various Types of Enhanced Heat Transfer Surfaces, in Introduction to Enhanced Heat Transfer, 2020. Crossref

  7. Saha Sujoy Kumar, Ranjan Hrishiraj, Emani Madhu Sruthi, Bharti Anand Kumar, Heat Transfer Fundamentals for Design of Heat Transfer Enhancement Devices, in Introduction to Enhanced Heat Transfer, 2020. Crossref

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