An analysis of flow and heat transfer in separated flows over blocked surface

被引：0

作者：

Yemenici, O. ^{[1
]}

Firatoglu, Z. A. ^{[2
]}

机构：

[1] Uludag Univ, Dept Mech Engn, TR-16059 Bursa, Turkey

[2] Univ Harran, Dept Mech Engn, Sanliurfa, Turkey

来源：

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE | 2013年 / 227卷 / C3期

关键词：

Flow separation; blocked surface; turbulent intensity; heat transfer enhancement; WALL-MOUNTED CUBES; TURBULENT-FLOW; RECTANGULAR BLOCKS; PRESSURE-DROP; FLUID-FLOW; CHANNEL; SIMULATION; LAMINAR; RIB;

D O I：

10.1177/0954406212463515

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The flow and heat transfer characteristics of flat and blocked surfaces were experimentally examined under the influence of the free stream velocity of 3, 5, 10 and 15 m/s encompassing laminar, transitional and turbulent flows. A constant-temperature hot wire anemometer was used for the velocity and turbulent intensity measurements, and copper-constant thermocouples and a micro-manometer for temperature and static pressures measurements, respectively. The flow over blocked surface separated in front of the first block and attached on it, then circulated between blocks, and then reattached behind the last block. The results showed that the flow separation before the first block occurred earlier in laminar-laminar separated-reattached flow than the transitional and turbulent flows and turbulent-turbulent separated-reattached flow leading to a shorter reattachment region with high free-stream turbulence. The presence of the separation and reattachment caused the heat transfer enhancement, which was more pronounced in the laminar flow and new empirical equations were developed for the local Stanton numbers.

引用

页码：481 / 491

页数：11

共 50 条

[21] A study on heat transfer enhancement for solar air heaters with ripple surface
Dong, Zhimin
Liu, Peng
Xiao, Hui
Liu, Zhichun
Liu, Wei
[J]. RENEWABLE ENERGY, 2021, 172 : 477 - 487
[22] The structure of separated flow and heat transfer in a round tube with single detached diaphragm
Terekhov, V., I
Bogatko, T., V
[J]. XXXV SIBERIAN THERMOPHYSICAL SEMINAR, 2019, 2019, 1382
[23] Visualization of flow pattern and thermal image analysis of enhanced heat transfer surface
Islam, M. D.
Oyakawa, K.
Kubo, I.
[J]. HEAT AND MASS TRANSFER, 2009, 45 (04) : 511 - 517
[24] CuO/WATER NANOFLUID FLOW OVER MICROSCALE BACKWARD-FACING STEP AND ANALYSIS OF HEAT TRANSFER PERFORMANCE
Ekiciler, Recep
Arslan, Kamil
[J]. HEAT TRANSFER RESEARCH, 2018, 49 (15) : 1489 - 1505
[25] Analysis of flow and heat transfer through a partially blocked fuel subassembly of fast breeder reactor
Sarkar, Madhusree
Velusamy, K.
Munshi, P.
Singh, Om Pal
[J]. PROGRESS IN NUCLEAR ENERGY, 2020, 118 (118)
[26] Secondary flow and heat transfer in turbulent flow over streamwise ridges
Stroh, A.
Schaefer, K.
Forooghi, P.
Frohnapfel, B.
[J]. INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, 2020, 81
[27] Experimental study of heat transfer and flow of delta winglets inline arrays in a tube heat exchanger for enhanced heat transfer
Islam, Md
Nurizki, A.
Barsoum, I
Ayish, Nader
Simmons, R.
[J]. HEAT TRANSFER, 2021, 50 (04) : 3582 - 3602
[28] Nanofluid flow and forced convection heat transfer over a stretching surface considering heat source
Mohammadpour, M.
Valipour, P.
Shambooli, M.
Ayani, M.
Mirparizi, M.
[J]. EUROPEAN PHYSICAL JOURNAL PLUS, 2015, 130 (07):
[29] Forcing of unsteady separated flow and convective heat transfer via bulk upstream oscillations
Bouhadji, A
Djilali, N
[J]. INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW, 2003, 24 (01) : 77 - 90
[30] Numerical analysis of heat transfer and flow dynamics in a pipe with square extruded bluff cylinder inserts
Bhattacharyya, Suvanjan
Banerjee, Arnab
Rahman, Md Anisur
Saha, Reeshika
Paul, Akshoy Ranjan
[J]. 2ND INTERNATIONAL CONFERENCE ON ENERGY AND POWER (ICEP2018), 2019, 160 : 293 - 300

← 1 2 3 4 5 →