Multi-objective shape optimization of a tube bundle in cross-flow

Ranut, Paola; Janiga, Gábor; Thévenin, Dominique

doi:10.1016/j.ijheatmasstransfer.2013.09.062

Cited by 40 publications

(12 citation statements)

References 49 publications

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“…The side view of the heat exchanger is shown in Figure 2(b). According to the previous investigations (Horvat et al, 2006;Ranut et al, 2014), the elliptical-profile tubes have better comprehensive performance than the circular-profile tubes on the basis of pressure losses as well as heat transfer characteristics. Therefore, the U-shaped tubes with an elliptical profile are used in the present study.…”

Section: Methodsmentioning

confidence: 96%

“…One of the most promising heat recuperators used in aero-engines is the double-U-shaped tube bundle heat exchanger (Min, Jeong, Ma, & Kim, 2009). Although extensive investigations have been carried out concerning the flow development and overall heat transfer through the tube bundle geometry (Horvat, Leskovar, & Mavko, 2006;Ranut, Janiga, Nobile, & Dominique, 2014;F. M. Wang, Zhang, & Wang, 2007), limited work has been performed on the flow and overall heat transfer through heat exchangers embedded inside an aero-engine exhaust nozzle, where the external flow passing through the tube bundle is more complicated due to various angles of attack.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of the pressure drop inside a rectangular channel with a built-in U-shaped tube bundle heat exchanger

Liu

Zhang

Shan

2016

Engineering Applications of Computational Fluid Mechanics

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A simplified approach which utilizes an isotropic porous medium model has been widely adopted for modeling the flow through a compact heat exchanger. With respect to situations where the compact heat exchangers are partially installed inside a channel, such as the application of recuperators in an intercooled recuperative engine, the use of an isotropic porous medium model needs to be carefully assessed because the flow passing through the heat exchanger is very complicated. For this purpose, in this study the isotropic porous medium model is assessed together with specific pressure-velocity relationships for flow field modeling inside a rectangular channel with a built-in double-U-shaped tube bundle heat exchanger. Firstly, experiments were conducted using models to investigate the relationship between the pressure drop and the inlet velocity for a specific heat exchanger with different installation angles inside a rectangular channel. Secondly, a series of numerical computations were carried out using the isotropic porous medium model and the pressure-velocity relationship was then modified by introducing correction coefficients empirically. Finally, a three-dimensional (3-D) direct computation was made using a computational fluid dynamics (CFD) method for the comparison of detailed flow fields. The results suggest that the isotropic porous medium model is capable of making precise pressure drop predictions given the reasonable pressure-velocity relationship but is unable to precisely simulate the detailed flow features.

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Section: Methodsmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Investigation of the pressure drop inside a rectangular channel with a built-in U-shaped tube bundle heat exchanger

Liu

Zhang

Shan

2016

Engineering Applications of Computational Fluid Mechanics

View full text Add to dashboard Cite

show abstract

“…Typically, the end-effects can be neglected, and the thermal-hydraulic characteristics of a surface can be determined by a segment of the HX where the lower, upper, and longitudinal boundaries are assumed periodic or symmetric. In the literature, the numerical analysis on finless surfaces commonly employ twodimensional computational domains (Bacellar et al 2014b;Hilbert et al 2006;Min and Webb 2004;Paitoonsurikarn et al 2000;Ranut et al 2014), which makes the simulations much lighter while still providing very reliable results.…”

Section: Cfd Modeling and Simulationmentioning

confidence: 99%

“…High-performing aerodynamic airfoil profiles have been studied on gas-engines (Onishi et al 2014) and intercooled gas turbines (Ito et al 2014). Other shape optimization studies include convective periodic channels (Cavazzuti and Corticelli 2008;Foli et al 2006;Nobile et al 2006;Stalio and Piller 2006), internally enhanced tubes (Duplain and Baliga 2009;Fabbri 1997Fabbri , 1998Lee and Lee 2013) and, most relevant to this work, the periodic crossflow over a tube bundle (Hilbert et al 2006;Ranut et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Design optimization and validation of high-performance heat exchangers using approximation assisted optimization and additive manufacturing

Bacellar

Aute

Huang

et al. 2017

Science and Technology for the Built Environment

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The airside thermal resistance of air-to-fluid heat exchangers dominates the overall thermal resistance. On conventional heat exchanger's, fins are required to address such challenges; but their benefits are not limitless and are bound mainly by the tube size and shape. The reduction of the tube characteristic length has favorable impact on compactness and heat transfer. Conventional tubes are typically limited to round, elliptical or flat shapes which result in particular thermal-hydraulic characteristics. The current article has three main objectives. First, discuss the importance of fins on typical air-to-fluid heat exchanger's and how they become unattractive at smaller characteristic lengths with numerical analyses to support this argument from different perspectives. Second, present a proof-of-concept design with small finless tubes and a novel shape that can outperform a microchannel heat exchanger. Third, present a comprehensive analysis with shape optimization leveraging automated computational fluid dynamics simulations and approximation assisted optimization techniques. Optimum designs can achieve more than 50% reduction in size, material, and pressure drop compared to the baseline microchannel heat exchanger. The method is validated with the experimental validation of a metal three-dimensional printed prototype of the NTHX-001. The numerical simulations agreed within less than 5% in capacity, 10% in air heat transfer coefficient, and 15% in air pressure drop.

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“…Power systems that include gas turbines are now designed to run at higher temperatures and higher pressures than ever before, and heat management systems containing heat exchangers such as recuperators, intercoolers, and advanced cooling air coolers have been included to improve efficiency [1,2]. A compact heat exchanger with small tubes has been considered to be an appropriate candidate for use at high pressures and temperatures, and such a heat exchanger could be compact, light, and cause little pressure loss [3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Acoustic resonance and pressure drop through a staggered tube bundle in a compact heat exchanger

Kim

Choi

Kim

et al. 2015

International Journal of Heat and Mass Transfer

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Multi-objective shape optimization of a tube bundle in cross-flow

Cited by 40 publications

References 49 publications

Investigation of the pressure drop inside a rectangular channel with a built-in U-shaped tube bundle heat exchanger

Investigation of the pressure drop inside a rectangular channel with a built-in U-shaped tube bundle heat exchanger

Design optimization and validation of high-performance heat exchangers using approximation assisted optimization and additive manufacturing

Acoustic resonance and pressure drop through a staggered tube bundle in a compact heat exchanger

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