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| 1 | Thermal performance of tubular heat exchanger with multiple twisted-tape inserts显示文摘The paper presents an experimental investigation on enhanced heat transfer and pressure loss characteristics by using single, double, triple, and quadruple twisted-tape inserts in a round tube having a uniform heat-fluxed wall.The investigation has been conducted in the heat exchanger tube inserted with various twisted-tape numbers for co- and counter-twist arrangements for the turbulent air flow, Reynolds number(Re) from 5300 to 24000. The typical single twisted-tape inserts at two twist ratios, y/w = 4 and 5, are used as the base case, while the other multiple twisted-tape inserts are at y/w = 4 only. The experimental results of heat transfer and pressure drop in terms of Nusselt number(Nu) and friction factor(f), respectively, reveal that Nu increases with the increment of Re and of twisted-tape number. The values of Nu for the inserted tube are in a range of 1.15–2.12 times that for the plain tube while f is 1.9–4.1 times. The thermal enhancement factor of the inserted tube under similar pumping power is evaluated and found to be above unity except for the single and the double co-twisted tapes. The quadruple counter-twisted tape insert provides the maximum thermal performance. | Suriya Chokphoemphun Monsak Pimsarn Chinaruk Thianpong Pongjet Promvonge | 2015 | Chinese Journal of Chemical Engineering2015，23，5： | 8 |
| 2 | Numerical prediction of vortex flow and thermal separation in a subsonic vortex tube显示文摘This work was aimed at gaining understanding of the physical behaviours of the flow and temperature separation process in a vortex tube. To investigate the cold mass fraction’s effect on the temperature separation, the numerical calculation was carried out using an algebraic Reynolds stress model (ASM) and the standard k-ε model. The modelling of turbulence of com-pressible, complex flows used in the simulation is discussed. Emphasis is given to the derivation of the ASM for 2D axisymmet-rical flows, particularly to the model constants in the algebraic Reynolds stress equations. The TEFESS code, based on a staggered Finite Volume approach with the standard k-ε model and first-order numerical schemes, was used to carry out all the computations. The predicted results for strongly swirling turbulent compressible flow in a vortex tube suggested that the use of the ASM leads to better agreement between the numerical results and experimental data, while the k-ε model cannot capture the stabilizing effect of the swirl. | SMITH Eiamsa-ard PONGJET Promvonge | 2006 | Journal of Zhejiang University-Science A(Applied Physics & Engineering)2006，7，8： | 5 |
| 3 | Thermal characteristics in round tube fitted with serrated twisted tape显示文摘 | Smith Eiamsa-ard Pongjet Promvonge | 2010 | Applied Thermal Engineering2010，，13： | 2 |
| 4 | Heat transfer behaviors in a tube with combined conical-ring and twisted-tape insert显示文摘 | P. Promvonge S. Eiamsa-ard | 2007 | International Communications in Heat and Mass Transfer2007，，7： | 2 |
| 5 | Heat transfer augmentation in a helical-ribbed tube with double twisted tape inserts 显示文摘 | Promvonge Pongjet Pethkool Somsak Pimsam Monsak | 2012 | International Communications in Heat and Mass Transfer2012，39，： | 1 |
| 6 | Review of Ranque - Hilsch effects in vortex tubes 显示文摘 | Eiamsa - ard S Promvonge P | 2008 | Renewable and Sus- tainable Energy Reviews2008，12，7： | 1 |
| 7 | Numerical prediction on laminar heat transfer in square duct with 30°angled baffle on one wall显示文摘 | KWANKAOMENG S PROMVONGE P | 2010 | International Communications in Heat and Mass Transfer2010，37，7： | 1 |
| 8 | Experimental investigation of heat transfer and flow friction in a circular tube fitted with regularly spaced twisted tape elements 显示文摘 | Eiamsa-ard S Thianpong C Promvonge P | 2006 | International Communications in Heat and Mass Transfer2006，33，： | 1 |
| 9 | Numerical analysis of laminar heat transfer in a channel with diamond-shaped baffles显示文摘 | Sripattanapipat S Promvonge P | 2009 | International Communications in Heat and Mass Transfer2009，36，1： | 1 |
| 10 | Numerical investigation of heat transfer in pulsating flows through a bluff plate显示文摘 | Suksangpanomrung A Chungpaibulpatana S Promvonge P | 2007 | International Communications in Heat and Mass Transfer2007，34，7： | 1 |
| 11 | Numerical study of laminar flow and heat transfer in square channel with 30° inline angled baffle turbulators显示文摘 | PROMVONGE P JEDSADARATANACHAI W KWANKAOMENG S | 2010 | Applied Thermal Engineering2010，30，1112： | 1 |
| 12 | 带翅片式涡流发生器的圆管内的传热强化(英文)显示文摘The article presents the influence of winglet vortex generators(WVGs)placed in the core flow area on thermal performance enhancement of a tube heat exchanger.The experiment was carried out in a uniform wall heat-fluxed tube by varying turbulent airflow for Reynolds number ranging from 5300 to 24000.In the present work,the WVGs with an attack angle of 30°were inserted into the test tube at four different winglet pitch ratios(RP=P/D)and three winglet-width or blockage ratios(RB=e/D).The experimental results at various RPand RBvalues were evaluated and compared with those for smooth tube and tubes with twisted tape or wire coil.The measurement reveals that the WVGs enhance considerably the heat transfer and friction loss above the plain tube,wire coil and twisted tape.The Nusselt number and friction factor increase with the increment of RBand Re but with the decreasing RP.The average Nusselt numbers for the WVGs with various RBare in the range of 2.03–2.34 times above the plain tube.The thermal performance for the WVGs is found to be much higher than that for the wire coil and twisted tape and is in a range of 1.35–1.59.Also,a numerical investigation is conducted to study the flow structure and heat transfer enhancement mechanisms in the winglet-inserted tube. | Suriya Chokphoemphun Monsak Pimsarn Chinaruk Thianpong Pongjet Promvonge | 2015 | Chinese Journal of Chemical Engineering2015，23，4： | 1 |
| 13 | Heat transfer in square duct fitted diagonally with angle-finned tape-Part 1: Experimental study显示文摘 | Promvonge P Skullong S Kwankaomeng S | 2012 | International Communications in Heat and Mass Transfer2012，39，5： | 1 |
| 14 | Experimental Investigation of Heat Transfer and Flow Friction in a Circular Tube Fitted with Regularly Spaced Twisted Tape Elements 显示文摘 | EIMSA-ARD S THIANPONG C PROMVONGE P | 2006 | Int Commun Heat Mass Trans{er2006，33，： | 1 |
| 15 | Heat transfer in square duct fitted diagonally with angle-finned tape- Part 2: Numerical study显示文摘 | Promvonge P Skullong S Kwankaomeng S | 2012 | International Communications in Heat and Mass Transfer2012，39，5： | 1 |
| 16 | Thermal Performance Assessment of Turbulent Tube Flow Through Wire Coil显示文摘 | Smith Eiamsa-ard Vichan Kongkaitpaiboon Pongjet Promvonge | 2011 | Turbu- lators Heat Transfer Engineering2011，32，1112： | 1 |
| 17 | Heat transfer and pressure drop in a channel with multiple 60 V - baffles 显示文摘 | Pungjet Promvonge | 2010 | international Communications in Heat and Mass Transfer2010，，37： | 1 |
| 18 | Enhanced heat transfer in rectangular duct with punched winglets显示文摘Thermal performance of a heat exchanger duct with punched winglets(PWs)mounted on the upper duct wall has been examined for Reynolds number(Re)ranging from 4100 to 25,500.In the present experiment,two types of PWs:punched delta-and elliptical-winglets(P-DW and P-EW)with four punched-hole sizes were tested at a fixed attack angle,optimal relative pitch and height.Also,data of solid delta-and elliptical-winglets(DW and EW)were included for comparison.The investigation has shown that the P-DW yields higher thermal-performance enhancement factor(η)than the P-EW.Although the solid DW and EW with no punch have the highest heat transfer and friction loss,the PWs yield betterηthan the solid ones.For PWs,the P-DW with smaller hole size has the peak heat transfer and friction loss around 5.7 and 40 times over the smooth duct,respectively but the optimumηof 2.17 is seen for the one with a certain hole size.The PWs provideηat about 5%–8%above the solid winglets. | Pongjet Promvonge Sompol Skullong | 2020 | Chinese Journal of Chemical Engineering2020，28，3： | 1 |
| 19 | Thermal performance in circular tube fitted with coiled square wires显示文摘 | Pongjet Promvonge | 2008 | Energy Conversion and Management2008，49，： | 1 |
| 20 | Effect of perforated twisted-tapes with parallel wings on heat transfer enhancement in a heat exchanger tube 显示文摘 | Thianponga C Eiamsa-arda P Promvonge R | 2011 | Sciverse Science Direct EnergyProcedia2011，14，： | 1 |
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