ASME Journal of Heat and Mass Transfer最新文献_第2页

The Impact of Roughness and Partitions In Thermal Convection to Enhance the Heat Transport 热对流中粗糙度和隔板对增强热量传输的影响

ASME Journal of Heat and Mass Transfer Pub Date : 2024-06-04 DOI: 10.1115/1.4065677

P. K. Kar, Ujjwal Chetan, Toshan Lal Sahu, Abhishek Sharma, Saurabh Dhopeshwar, Prasanta Das, Rajaram Lakkaraju

{"title":"The Impact of Roughness and Partitions In Thermal Convection to Enhance the Heat Transport","authors":"P. K. Kar, Ujjwal Chetan, Toshan Lal Sahu, Abhishek Sharma, Saurabh Dhopeshwar, Prasanta Das, Rajaram Lakkaraju","doi":"10.1115/1.4065677","DOIUrl":"https://doi.org/10.1115/1.4065677","url":null,"abstract":"\u0000 This investigation delves into the profound influence of adiabatic partitions on heat transport within a square Rayleigh-Benard (RB) convection enclosure characterized by surface roughness on the lower hot and upper cold plates. These surface irregularities manifest as a rectangular base and a triangular apex. Employing two-dimensional (2D) direct numerical simulations across a Rayleigh number (Ra) range of 106 to 108 and a Prandtl number (Pr) of 1, our study focuses on strategically positioned adiabatic partitions between successive roughness elements. Notably, we uncover a significant enhancement in heat transport with the introduction of partition boards between consecutive roughness elements. As the number of partitions increases from one to four, the heat flux experiences a remarkable augmentation, reaching 2.3 times that of the classical square RB configuration. This enhancement arises from the breakdown of large-scale rolls into multiple rolls, a phenomenon intensified by increased partition height. Intriguingly, configurations featuring roughness with partitions exhibit a 2.7-fold increase in heat flux compared to the classical square RB setup. The interplay of surface roughness and partitions contributes to this improvement, with optimized gap distances between the conduction plate and partition heightening local velocity, thinning the thermal boundary layer, and augmenting overall heat flux. This study sheds light on the synergistic effects of adiabatic partitions and surface roughness in RB convection, indicating the potential for tailored design strategies involving partitions and surface modifications to optimize thermal performance across various applications.","PeriodicalId":505153,"journal":{"name":"ASME Journal of Heat and Mass Transfer","volume":"5 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141265896","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced Air-Flow Forced Convection Through Metal Foams: Contrasting Compressed and Uncompressed Foams 通过金属泡沫增强气流强制对流：压缩泡沫与非压缩泡沫的对比

ASME Journal of Heat and Mass Transfer Pub Date : 2024-06-04 DOI: 10.1115/1.4065676

C. Nanda, Metodi Zlatinov, R. M. Manglik

{"title":"Enhanced Air-Flow Forced Convection Through Metal Foams: Contrasting Compressed and Uncompressed Foams","authors":"C. Nanda, Metodi Zlatinov, R. M. Manglik","doi":"10.1115/1.4065676","DOIUrl":"https://doi.org/10.1115/1.4065676","url":null,"abstract":"\u0000 The influence of complex pore architecture, its characteristic length, and the contrast between compressed and uncompressed open-cell foam structures in forced convection are explored experimentally. Air flow (Pr ~ 0.71; 300 < Re < 10,000) data is presented and a critical issue of the appropriate definition of the hydraulic diameter, especially with foams of different pores/inch (ppi) and compressions, is addressed. Instead of the usual characterization, fin theory is applied and for this the foam void volume structure is precision mapped by micro-CT scans. The veracity of defining the hydraulic diameter as 4? void volume divided by wetted area is supported by forced convection heat transfer results for different uncompressed and compressed metallic (aluminum) foam cores. All foams promote higher heat transfer coefficients, albeit accompanied with greater pressure drop. While the latter increases with foam ppi and compression (decreasing porosity), the former has a more complex interplay with these factors along with surface area changes and ligament fin effects. This scales with thermally effective surface area density βe (product of area density and overall fin effectiveness), and the overall convective-conductance of the foam (product of empty-duct-based heat transfer coefficient ho and βe) increases. The consequent enhancement, when evaluated by a modified volume goodness factor figure of merit, shows that the 40 ppi compressed foam (X3-in-x) performance is the highest (~ 15-45 times an empty duct for the same fan power) with significant reduction in the volume of a heat exchanger.","PeriodicalId":505153,"journal":{"name":"ASME Journal of Heat and Mass Transfer","volume":"7 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141266368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Equivalent Enthalpy Model and Log-Mean Enthalpy Difference Method for Heat-Mass Transfer in Cooling Towers 冷却塔热质传递的等效焓模型和对数平均焓差法

ASME Journal of Heat and Mass Transfer Pub Date : 2024-05-21 DOI: 10.1115/1.4065572

Yiding Cao

{"title":"Equivalent Enthalpy Model and Log-Mean Enthalpy Difference Method for Heat-Mass Transfer in Cooling Towers","authors":"Yiding Cao","doi":"10.1115/1.4065572","DOIUrl":"https://doi.org/10.1115/1.4065572","url":null,"abstract":"\u0000 In industrial processes involving both heat and mass transfer, the enthalpy or total energy difference, not the temperature difference, is a more comprehensive driving-force potential for heat exchanger systems, such as a cooling tower. However, the common practice of current enthalpy methods based on Merkel integral requires numerical integration with implied linear distributions of air enthalpy and water temperature. If the cooling range is relatively small, the outcome of the integration may carry little error. But for a large cooling range and a substantially increased temperature, the error involved may be significant. Like log-mean temperature difference, a log-mean enthalpy difference method may require only the inlet and outlet conditions without prior knowledge of the enthalpy distributions of the fluids within the heat exchanger. The known Berman's enthalpy difference method requires correction factors, which was derived based on the linearization of the interfacial enthalpy and the enthalpy difference between the interfacial moist-air enthalpy and the bulk air enthalpy without underlying interpretation to demonstrate that the method could be broadly used. In this paper, an equivalent enthalpy model is proposed, and the log-mean enthalpy difference is derived without any constraints for broad uses. The derived method is compared with the results of Merkel's method from literature with excellent agreement. Thus, the work in this paper would open the possibility for broad uses of the log-mean enthalpy difference method for many industrial processes involving mass transfer.","PeriodicalId":505153,"journal":{"name":"ASME Journal of Heat and Mass Transfer","volume":"19 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141118403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Integrated Thermal Management System Concept with Combined Jet Plate, High Porosity Aluminum Foam and Target Plate for Enhanced Heat Transfer 采用喷流板、高孔隙率铝泡沫和靶板组合增强热传递的集成热管理系统概念

ASME Journal of Heat and Mass Transfer Pub Date : 2024-05-21 DOI: 10.1115/1.4065575

Youssef Aider, Prashant Singh

{"title":"Integrated Thermal Management System Concept with Combined Jet Plate, High Porosity Aluminum Foam and Target Plate for Enhanced Heat Transfer","authors":"Youssef Aider, Prashant Singh","doi":"10.1115/1.4065575","DOIUrl":"https://doi.org/10.1115/1.4065575","url":null,"abstract":"\u0000 An experimental investigation was carried out on high porosity metal foams subjected to array jet impingement with an objective to develop enhanced heat transfer configurations. In this study, we propose an integrated thermal management system aimed towards leveraging the conjugate heat transfer capabilities of target plate, metal foam, and the jet plate - all made from aluminum and assembled such that a proper contact between them can be established. Steady-state heat transfer experiments were carried out for 10 and 20 pores per inch (PPI) aluminum foams of 0.93 porosity. Both metal foams were 12.7 mm thick. The normalized jet-to-jet spacing was varied from 2 to 12 times the jet diameter, while the jet diameter was fixed. The ratio of the jet plate thickness and jet diameter (nozzle aspect ratio) was 6.35, which ensured proper development of jets inside the nozzles. Experiments were conducted over a wide range of Reynolds number (based on jet diameter) varied from 100 to 5,000. The obtained convective heat transfer coefficient for different configuration was evaluated in context with pressure drop. The analysis of experimental results reveal that large open area ratio jets combined with high porosity metal foams provide highly efficient and high-performance cooling for the investigated range of Reynolds numbers.","PeriodicalId":505153,"journal":{"name":"ASME Journal of Heat and Mass Transfer","volume":"35 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141117037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Study of a Novel Helix-Shaped Oscillating Heat Pipe and Design Parameters for Flow Stabilization 新型螺旋形振荡热管的实验研究及稳定流体的设计参数

ASME Journal of Heat and Mass Transfer Pub Date : 2024-05-21 DOI: 10.1115/1.4065576

Maxwell Pawlick, G. P. “Bud” Peterson

{"title":"Experimental Study of a Novel Helix-Shaped Oscillating Heat Pipe and Design Parameters for Flow Stabilization","authors":"Maxwell Pawlick, G. P. “Bud” Peterson","doi":"10.1115/1.4065576","DOIUrl":"https://doi.org/10.1115/1.4065576","url":null,"abstract":"\u0000 Abstract A novel helix-shaped oscillating heat pipe (OHP) designed for enhanced heat transfer in thermal management and heat recovery was studied experimentally. Two orientations were explored: side-heated, the intended orientation in which improved fluid circulation is expected, and bottom-heated, a control resembling traditional bottom-heated OHPs. Results showed stronger circulation, reduced temperature differences, and lower start-up thresholds in most side-heated cases. This orientation achieved higher maximum heat loads at a fill ratio of 0.5, although the maximum heat load decreased at a fill ratio of 0.7. Notably, the experimental OHP attained an effective thermal conductivity over 9,000 W m-K-1 in multiple tests and a maximum heat transport of 676 W. Additional parameters were explored including heat load, fill ratio, condenser temperature, and the presence of noncondensable gases (NCGs). NCGs increased the temperature drop as expected, but also raised the maximum heat transport, indicating potential benefits in certain applications. Elevated condenser temperatures decreased temperature drops, but also reduced maximum heat transport. A previously developed OHP performance model was expanded to evaluate the novel helix-shaped OHP. The model reasonably predicted temperature drops during degassed experiments under moderate heat loads. However, most data points fell outside the model's scope, emphasizing the need to extend it to handle condenser bubble collapse. The expanded analytical models for side-heated helix OHPs highlighted restrictions on circulation that differed from traditional, bottom-heated OHPs, which explains the superior performance of the novel design.","PeriodicalId":505153,"journal":{"name":"ASME Journal of Heat and Mass Transfer","volume":"124 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141115354","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Minimum Air Cooling Requirements for Different Lithium-ion Battery Operating Statuses 不同锂离子电池工作状态下的最低空气冷却要求

ASME Journal of Heat and Mass Transfer Pub Date : 2024-05-20 DOI: 10.1115/1.4065558

Yabo Wang, Xiang Yin, Xueqiang Li, Hailong Li, Shengchun Liu, Xinlin Zhu, Xiaolei Ma

{"title":"Minimum Air Cooling Requirements for Different Lithium-ion Battery Operating Statuses","authors":"Yabo Wang, Xiang Yin, Xueqiang Li, Hailong Li, Shengchun Liu, Xinlin Zhu, Xiaolei Ma","doi":"10.1115/1.4065558","DOIUrl":"https://doi.org/10.1115/1.4065558","url":null,"abstract":"\u0000 Batteries play an important role in increasing the use of renewable energy sources. Owing to the temperature sensitivity of lithium-ion batteries (LIBs), battery thermal management systems (BTMSs) are crucial to ensuring the safe and efficient operation of LIBs. Researchers have mainly focused on evaluating the performance of BTMS; however, little attention has been paid to the minimum cooling requirements of LIBs, which are important for optimizing the design and operation of BTMSs. To bridge this knowledge gap, the aim in this study was to determine the minimum air cooling requirements for different LIBs operating statuses based on computational fluid dynamics simulations. The inlet airflow rate had the strongest influence. For the studied cases, when the battery operates at charge/discharge (C) rate of three or below, the inlet temperature should be set below 35 °C, and the gap between the batteries should be greater than 3 mm to meet the minimum heat dissipation requirement. At a C-rate of 0.5C, natural convection is sufficient to meet the cooling needs, whereas at 1C or higher rates, forced convection is required. Increasing the number of batteries from six to eight has little impact on the inlet flow required to accommodate the battery heat dissipation.","PeriodicalId":505153,"journal":{"name":"ASME Journal of Heat and Mass Transfer","volume":"23 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141119307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Transient Heat Transfer to Rolling Or Sliding Drops On Inclined Heated Superhydrophobic Surfaces 倾斜加热超疏水表面上滚动或滑动水滴的瞬态传热

ASME Journal of Heat and Mass Transfer Pub Date : 2024-04-18 DOI: 10.1115/1.4065353

Joseph Furner, Daniel Maynes, Brian D. Iverson, J. Crockett

{"title":"Transient Heat Transfer to Rolling Or Sliding Drops On Inclined Heated Superhydrophobic Surfaces","authors":"Joseph Furner, Daniel Maynes, Brian D. Iverson, J. Crockett","doi":"10.1115/1.4065353","DOIUrl":"https://doi.org/10.1115/1.4065353","url":null,"abstract":"\u0000 The thermal transport to drops that roll or slide down heated superhydrophobic surfaces is explored. High-speed infrared imaging is performed to provide time-resolved measurement of the heat transfer to the drop. Data are obtained for drops moving along smooth hydrophobic and structured superhydrophobic surfaces. Both post and rib style structures with surface solid fractions ranging from 0.06 to 1.0 are considered. The inclination angle of the surfaces was varied from 10° to 25° and the drop volume was varied from 12 to 40 µL. The measurements reveal that the drop speed is a strong function of both the inclination angle and the surface solid fraction. Further, the heat transfer is strongly affected by the surface solid fraction and the drop speed. Surfaces with low solid fraction result in a decrease in the initial heat transfer compared to the behavior observed for drops on a smooth surface. At the smallest solid fractions explored the reduction in heat transfer is nearly 80%. For rib structured surfaces, drop motion both along and perpendicular to the rib direction was considered and the heat transfer is larger for drops moving in the parallel rib configuration. It is likely that this variation is caused by the increased rolling speed that prevails for the parallel rib case. Over 130 unique conditions were explored and the results from all cases were used to develop correlations that enable prediction of the heat transfer to drops rolling or sliding down smooth hydrophobic and superhydrophobic surfaces.","PeriodicalId":505153,"journal":{"name":"ASME Journal of Heat and Mass Transfer","volume":" 36","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140688292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical Investigation On Overall Cooling Effectiveness of Narrow-Channel Double-Wall Cooling 窄通道双壁冷却器整体冷却效果的数值研究

ASME Journal of Heat and Mass Transfer Pub Date : 2024-04-18 DOI: 10.1115/1.4065350

Guangyao Xu, Qiang Du, Qingzong Xu, Hongye Li, Haoyang Liu

{"title":"Numerical Investigation On Overall Cooling Effectiveness of Narrow-Channel Double-Wall Cooling","authors":"Guangyao Xu, Qiang Du, Qingzong Xu, Hongye Li, Haoyang Liu","doi":"10.1115/1.4065350","DOIUrl":"https://doi.org/10.1115/1.4065350","url":null,"abstract":"\u0000 In the double-wall cooling of turbine blades, the migration of coolant can lead to uneven flow distribution. In severe cases, it can cause hot gas intrusion into the film holes, affecting the lifespan of the blade. In order to mitigate the negative influence of coolant migration, this study proposes a novel double-wall system called narrow-channel double-wall cooling system, where thin walls are arranged inside the internal channel of double-wall cooling to achieve a more balanced coolant distribution for film holes. However, the addition of thin walls alters the flow and heat transfer distributions within the double-wall structure, ultimately affecting the overall cooling effectiveness. Therefore, numerical methods were employed in this study to analyze the flow distribution characteristics, overall cooling effectiveness, and internal heat transfer characteristics of the narrow-channel double-wall cooling. The numerical results demonstrated that narrow-channel double-wall cooling, with or without pin fins, significantly improved the uneven mass flow distribution in the film holes while maintaining an overall cooling effectiveness comparable to that of the double-wall effusion cooling system. It is worth noting that although the overall cooling effectiveness difference is slight, there are significant differences in the internal heat transfer characteristics between the two double-wall cooling systems. Additionally, the study discussed the influence of narrow wall thickness on the overall cooling effectiveness and flow distributions, revealing that a thinner wall can lead to higher overall cooling effectiveness in narrow-channel double-wall cooling.","PeriodicalId":505153,"journal":{"name":"ASME Journal of Heat and Mass Transfer","volume":"184 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140686400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Ultrathin-Walled Foam Heat Pipe 超薄壁泡沫热管

ASME Journal of Heat and Mass Transfer Pub Date : 2024-04-18 DOI: 10.1115/1.4065352

Yi Xiang Wang, Cheng Qin Yu, Kiju Kang, M. Atkins, Tongbeum Kim

{"title":"An Ultrathin-Walled Foam Heat Pipe","authors":"Yi Xiang Wang, Cheng Qin Yu, Kiju Kang, M. Atkins, Tongbeum Kim","doi":"10.1115/1.4065352","DOIUrl":"https://doi.org/10.1115/1.4065352","url":null,"abstract":"\u0000 We present an advanced thermal solution for capillary-driven heat pipes that addresses a fundamental problem with existing heat pipes being inefficient space utilization and limited thermal spreading performance. Our solution features the full occupation of open-cell foam core and ultrathin-walled envelope - an ultrathin-walled foam heat pipe (uFHP). A copper layer is formed sequentially via electroless - and electro-plating, and envelopes a tailored block of open-cell foam core, followed by a series of chemical surface treatments that create a nanoscale texture on the foam ligament and envelope's inner surfaces for improved capillary pumping. The high porosity foam core (e = 0.974) for vapor passaging and wicking, and the ultrathin-walled envelope of ~50 µm, make the uFHP remarkably lightweight (64% lighter than commercial heat pipes). Further, conductive spreading and convective transfer of heat from vapor and condensate by foam ligaments to the envelope, increase overall heat rejection. Consequently, the thermal resistance and evaporator temperature are reduced. More importantly, the uFHP could be tailored into any cross-sectional (e.g., non-circular) shape. This tailorable uFHP can be an alternative heat pipe thermal solution for extreme compact operations that require improved thermal performance.","PeriodicalId":505153,"journal":{"name":"ASME Journal of Heat and Mass Transfer","volume":" 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140689113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of Leading Edge Shape On Effusion Film Cooling 前缘形状对喷射膜冷却的影响

ASME Journal of Heat and Mass Transfer Pub Date : 2024-04-18 DOI: 10.1115/1.4065348

Yu-Chuan Chang, S. Huang, Chih-Yung Huang, Yao-Hsien Liu

{"title":"Effects of Leading Edge Shape On Effusion Film Cooling","authors":"Yu-Chuan Chang, S. Huang, Chih-Yung Huang, Yao-Hsien Liu","doi":"10.1115/1.4065348","DOIUrl":"https://doi.org/10.1115/1.4065348","url":null,"abstract":"\u0000 This study investigated the effusion film cooling on a turbine leading edge model. The pressure sensitive paint (PSP) technique was employed to analyze the film cooling effectiveness. Three different leading edge profiles were tested, including a semi-cylinder and two elliptical models. Effusion cooling was achieved by employing closely spaced small holes, and Stereolithography was utilized to create the perforated region. The study examined the impact of different blowing ratios (0.4, 0.8, and 1.2), while maintaining a unity density ratio. For benchmark testing purposes, three rows of film cooling holes on these leading edge models were also studied for traditional film cooling scenarios. The film cooling rows consisted of 15 holes positioned at the stagnation line (0°) and ±30° away from it. All test models were placed in a low-speed wind tunnel for experimentation at a Reynolds number of 100,000. Two different streamwise spacings of the effusion holes were examined in this study. The results indicate that effusion cooling was more effective in cooling compared to traditional film cooling methods. When considering the same leading edge shape, the adiabatic cooling effectiveness of effusion cooling was 30-100% higher than that of traditional film cooling. It was observed that increasing the streamwise spacing had a negative impact on the cooling effectiveness, regardless of the leading edge profile being used. Furthermore, variations in blowing ratio did not significantly affect the effectiveness of effusion cooling, and no noticeable blow-off of coolant was observed.","PeriodicalId":505153,"journal":{"name":"ASME Journal of Heat and Mass Transfer","volume":" 27","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140687303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0