Numerical investigation of a novel jet hole design for staggered array jet impingement cooling on a semicircular concave surface

Tepe, Ahmet Ümit

doi:10.1016/j.ijthermalsci.2020.106792

Cited by 27 publications

(11 citation statements)

References 49 publications

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“…It was observed from the results that a high average Nu is achieved using a TGR and a horse-shoe shape is created in the high-Nu region due to the TGR through the acceleration of the impinging jet. A numerical study was performed by Tepe [64] to investigate heat transfer performance over a semi-circular concave target surface by impinging a staggered array jet with a novel hole jet design (see Figure 6). The Reynolds number (based on the jet diameter) range during the study was varied from 5000 to 25,000, the spacing between confinement plate and target surface plate (H/d) was varied from 1.0 to 8.0, and the spacing between jet nozzle and target surface plate (G/d) was altered from 0.5 to 6.0.…”

Section: Pachpute and Premachandran [57]mentioning

confidence: 99%

Heat Transfer Augmentation through Different Jet Impingement Techniques: A State-of-the-Art Review

et al. 2021

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Jet impingement is considered to be an effective technique to enhance the heat transfer rate, and it finds many applications in the scientific and industrial horizons. The objective of this paper is to summarize heat transfer enhancement through different jet impingement methods and provide a platform for identifying the scope for future work. This study reviews various experimental and numerical studies of jet impingement methods for thermal-hydraulic improvement of heat transfer surfaces. The jet impingement methods considered in the present work include shapes of the target surface, the jet/nozzle–target surface distance, extended jet holes, nanofluids, and the use of phase change materials (PCMs). The present work also includes both single-jet and multiple-jet impingement studies for different industrial applications.

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Section: Pachpute and Premachandran [57]mentioning

confidence: 99%

Heat Transfer Augmentation through Different Jet Impingement Techniques: A State-of-the-Art Review

et al. 2021

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“…Sayısal çalışmaları gerçekleştirilen çukur/çıkıntının Termal Performans Faktörü aşağıdaki gibi hesaplanabilir (S. W. Chang vd., 2021;Maradiya vd, 2018;Tepe, 2021;Tepe, vd, 2020;Tepe, vd, 2020;Wang vd, 2001).…”

Section: Termal Performans Faktörüunclassified

Kanatlı-Borulu Isı Değiştiricilerinde Çukurlu/Çıkıntılı Kanat ile Isı Transfer Performansının Arttırılması

Tepe¹

2021

European Journal of Science and Technology

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Bu çalışmada kanatlı-borulu ısı değiştiricisinde çukurlu/çıkıntılı kanatın ısı transfer performansına ve akış karakteristiklerine etkisi sayısal olarak incelenmiştir. En uygun tasarım parametresini belirlemek için kanat üzerine dairesel ve 0,667 ile 1,50 olmak üzere iki farklı ovallik oranlı (a/b) çukurlar çift sıralı olarak yerleştirilerek ısı transfer performansına etkisi araştırılmıştır. Dairesel çukurun çapı 2,8 mm olarak belirlenmiştir. Oval çukurların kesit alanı ise dairesel çukurla eşit tutulmuştur. Hesaplamalar 500, 1000, 1500 ve 2000 olmak üzere 4 farklı Reynold (Re) sayısında laminar akış rejiminde yapılmıştır. Sayısal hesaplamalar Ansys Fluent 19.2 ile RNG k-ε türbülans modeli kullanılarak gerçekleştirilmiştir. Ortalama Nusselt sayısı ( ̅̅̅̅ ), yüzey üzerinde yanal ortalamalı Nu sayısı dağılımları, termal performans faktörü (TPF) ve akış karakteristikleri ayrıntılı olarak incelenmiştir. Sonuçlar çukur olmayan düz yüzeyli kanatçık ile karşılaştırılmıştır. Sayısal sonuçlar, yüzey üzerine yerleştirilen çukurların/çıkıntıların düz yüzeye göre ısı transferini %26,63'e kadar arttırdığını ortaya koymuştur. Bununla birlikte, TPF sonuçlarına göre ısı transferi artışında en uygun tasarımın dairesel çukurlu/çıkıntılı kanat tasarımının olduğu tespit edilmiştir.

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“…For this purpose, the active and passive heat transfer techniques have been taken into consideration to achieve more convective heat transfer rate. To obtain higher heat removal on the surfaces, the jet impingement method, which is one of the most important active heat transfer techniques, is often utilized in several industrial areas such as electronic equipment cooling [1], micro or nano-scale cooling [2], increase of effect of nanofluid's cooling performance [3], gas turbine blade cooling [4], and solar air heater's absorber surface cooling [5]. On the other hand, the use of air jet impingement method is usually preferred for anti-icing application of aircraft [6].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Parameters Affecting Anti-Icing Performance on Wing Leading Edge of Aircraft

Pazarlıoğlu

Tepe

Arslan

2022

European Journal of Science and Technology

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In this article, one of the hazardous trouble in-flight situations called ice accumulation on wing leading edge of aircraft has been numerically investigated. While the target surface is kept constant temperature at Tw=263.15 K, the inlet temperature is taken constant at Tin=473.15 K and it enters to the system with 𝑚̇= 0.004 kg/s. The investigation starts with validation of numerical study utilizing airfoil type of NACA 0015 using constant piccolo tube dimensions, jet angle, distance among jets and distance between jet-to-target positions. The second and third stages are to analyze the anti-icing performance of changing positions of piccolo tube on X (4≤H/d≤8) and Y (-1.25≤L/d≤1.25) directions under different jet angles (30°≤≤150°). The fourth stage is to determine the optimum H/d, L/d, and ratios to increase anti-icing performance with maximum convective heat transfer and minimum pressure drop condition. The optimization study has been done using Response Surface Methodology (RSM). Finally, while the best anti-icing performance proposed design is achieved using° L/d=0.0, and H/d=4.0, the optimization results show that the L/d, and H/d values should be 55.45°, 0.0, and 4.0, respectively to achieve maximum heat transfer rate with minimum pressure drop value.

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Numerical investigation of a novel jet hole design for staggered array jet impingement cooling on a semicircular concave surface

Cited by 27 publications

References 49 publications

Heat Transfer Augmentation through Different Jet Impingement Techniques: A State-of-the-Art Review

Heat Transfer Augmentation through Different Jet Impingement Techniques: A State-of-the-Art Review

Kanatlı-Borulu Isı Değiştiricilerinde Çukurlu/Çıkıntılı Kanat ile Isı Transfer Performansının Arttırılması

Optimization of Parameters Affecting Anti-Icing Performance on Wing Leading Edge of Aircraft

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