Details
| Original language | English |
|---|---|
| Pages (from-to) | 229-246 |
| Number of pages | 18 |
| Journal | International Journal of Microstructure and Materials Properties |
| Volume | 11 |
| Issue number | 3-4 |
| Publication status | Published - 22 Sept 2016 |
Abstract
Numerical simulation of quenching by air-water spray cooling requires an accurate knowledge of the spray heat transfer coefficients (HTCs). In this work, a novel method of heat transfer determination is presented that takes lacking aspects of prior determination methods into account. The temperature trends during cooling of a thin-walled tube are used in an optimisation calculation based on a numerical model of the setup to determine the HTCs. It is shown that higher inlet pressures lead to higher heat transfers and that the heat transfer between two spray nozzles increases with decreasing nozzle to nozzle distance. However, for some cases, adjacent sprays can lead to decreasing HTCs. The amount of nozzles in circumferential direction had an overproportioned effect on the heat transfer in the film boiling regime. Verifications generally show a good agreement of measured with computed temperature trends based on the calculated HTCs.
Keywords
- Air-water spray cooling, Calculation artefacts, Heat flow, Heat transfer coefficient, Heat treatment, HTC, Nozzle count, Numerical simulation, Optimisation calculation, Quenching, Spray overlapping, Verification
ASJC Scopus subject areas
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In: International Journal of Microstructure and Materials Properties, Vol. 11, No. 3-4, 22.09.2016, p. 229-246.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Determination of heat transfer coefficients for complex spray cooling arrangements
AU - Herbst, Sebastian
AU - Steinke, Kim Florian
AU - Maier, Hans Jürgen
AU - Milenin, Andrzej
AU - Nürnberger, Florian
N1 - Publisher Copyright: © 2016 Inderscience Enterprises Ltd. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2016/9/22
Y1 - 2016/9/22
N2 - Numerical simulation of quenching by air-water spray cooling requires an accurate knowledge of the spray heat transfer coefficients (HTCs). In this work, a novel method of heat transfer determination is presented that takes lacking aspects of prior determination methods into account. The temperature trends during cooling of a thin-walled tube are used in an optimisation calculation based on a numerical model of the setup to determine the HTCs. It is shown that higher inlet pressures lead to higher heat transfers and that the heat transfer between two spray nozzles increases with decreasing nozzle to nozzle distance. However, for some cases, adjacent sprays can lead to decreasing HTCs. The amount of nozzles in circumferential direction had an overproportioned effect on the heat transfer in the film boiling regime. Verifications generally show a good agreement of measured with computed temperature trends based on the calculated HTCs.
AB - Numerical simulation of quenching by air-water spray cooling requires an accurate knowledge of the spray heat transfer coefficients (HTCs). In this work, a novel method of heat transfer determination is presented that takes lacking aspects of prior determination methods into account. The temperature trends during cooling of a thin-walled tube are used in an optimisation calculation based on a numerical model of the setup to determine the HTCs. It is shown that higher inlet pressures lead to higher heat transfers and that the heat transfer between two spray nozzles increases with decreasing nozzle to nozzle distance. However, for some cases, adjacent sprays can lead to decreasing HTCs. The amount of nozzles in circumferential direction had an overproportioned effect on the heat transfer in the film boiling regime. Verifications generally show a good agreement of measured with computed temperature trends based on the calculated HTCs.
KW - Air-water spray cooling
KW - Calculation artefacts
KW - Heat flow
KW - Heat transfer coefficient
KW - Heat treatment
KW - HTC
KW - Nozzle count
KW - Numerical simulation
KW - Optimisation calculation
KW - Quenching
KW - Spray overlapping
KW - Verification
UR - http://www.scopus.com/inward/record.url?scp=84988579059&partnerID=8YFLogxK
U2 - 10.1504/ijmmp.2016.079149
DO - 10.1504/ijmmp.2016.079149
M3 - Article
AN - SCOPUS:84988579059
VL - 11
SP - 229
EP - 246
JO - International Journal of Microstructure and Materials Properties
JF - International Journal of Microstructure and Materials Properties
SN - 1741-8410
IS - 3-4
ER -