Thermophysics and Aeromechanics最新文献_第8页

Management optimization of temperature and pressure drop inside multi-core 3D integrated circuits with microchannels 微通道多核3D集成电路内温度和压降的管理优化

IF 0.6 4区工程技术

Thermophysics and Aeromechanics Pub Date : 2025-07-25 DOI: 10.1134/S0869864324060246

P. Z. Chen, Z. L. Pan

{"title":"Management optimization of temperature and pressure drop inside multi-core 3D integrated circuits with microchannels","authors":"P. Z. Chen, Z. L. Pan","doi":"10.1134/S0869864324060246","DOIUrl":"10.1134/S0869864324060246","url":null,"abstract":"<div><p>The introduction of three-dimensional integrated circuit (3D IC) technology is expected to break the limitations of Moore’s law. In response to the increasingly severe thermal management problem of multi-core 3D ICs, this paper developed a 3D IC model with double-layers and microchannels to analyze the temperature and pressure drop distribution inside the model. The effects of micro-pin fin arrangement, upper microchannel structure, coolant flow direction, and different regions on the cooling performance of the model were studied. The results show that compared to in-lined and staggered arrangement of the same proportion, the non-same proportion in-lined and staggered arrangement proposed in this paper can reduce the pressure drop by at least 31 % without increasing the maximum processor temperature. For the three structures of cuboid, cuboid (in-lined), and cylinder (in-lined), the use of cylinder (in-lined) structure in the upper microchannel can achieve better cooling performance. For counter flow and parallel flow, using counter flow can lower the maximum temperature and pressure drop; using parallel flow can reduce the average temperature and temperature gradient. In addition, compared with increasing Reynolds number of the upper microchannel, increasing Reynolds number of the bottom microchannel can achieve lower maximum temperature and pressure drop.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"31 6","pages":"1333 - 1348"},"PeriodicalIF":0.6,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of rotation on forced turbulent flow and heat transfer in a ribbed U-duct 旋转对带肋u型管道内强迫湍流流动和换热的影响

IF 0.6 4区工程技术

Thermophysics and Aeromechanics Pub Date : 2025-07-25 DOI: 10.1134/S0869864324060015

V. V. Ris, A. M. Levchenya, S. A. Galaev, I. A. Ignatiev

{"title":"Effect of rotation on forced turbulent flow and heat transfer in a ribbed U-duct","authors":"V. V. Ris, A. M. Levchenya, S. A. Galaev, I. A. Ignatiev","doi":"10.1134/S0869864324060015","DOIUrl":"10.1134/S0869864324060015","url":null,"abstract":"<div><p>The paper presents a method and simulation results for turbulent airflow and heat transfer in a U-shaped square duct with straight sections and with two ribbed opposite sides. For a flow with Reynolds number of 6·10<sup>4</sup> and Prandtl number of 2.5, the numerical solution method was validated by comparing the simulated and experimental data on local heat and mass transfer in geometrically identical U-ducts; the ribs inclined to the duct axis by 45 and 60 deg. For one of these ducts with the rib inclination angle of 45 deg (at the same Reynolds number and Prandtl number of 0.71), the flow patterns and heat transfer were calculated for a stationary state and for a mode with rotation (with the rotation parameter values of 0.1 and 0.25). The rotation axis is perpendicular to the duct axis and parallel to the duct bending plane. The numerical data for the U-shaped duct are compared with the data for a fully developed (periodic) flow and heat transfer for a straight duct with ribbing. It is shown that for a U-duct, the effect of rotation has a positive influence on heat transfer enhancement.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"31 6","pages":"1121 - 1137"},"PeriodicalIF":0.6,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microstructure of two-phase flow and mass transfer in porous systems and packed beds 多孔系统和填料床中两相流动和传质的微观结构

IF 0.6 4区工程技术

Thermophysics and Aeromechanics Pub Date : 2025-07-25 DOI: 10.1134/S0869864324060106

V. V. Kuznetsov

引用次数: 0

Determination of the effective wavelength of non-monochromatic photodetectors in spectral-brightness pyrometry 光谱-亮度热分析法中非单色光电探测器有效波长的测定

IF 0.6 4区工程技术

Thermophysics and Aeromechanics Pub Date : 2025-07-25 DOI: 10.1134/S0869864324060209

I. P. Gulyaev

引用次数: 0

Research on nitrogen reduction performance of various modes combined air-staged with air humidification for gas boiler 燃气锅炉不同空气分级加湿方式的减氮性能研究

IF 0.6 4区工程技术

Thermophysics and Aeromechanics Pub Date : 2025-07-25 DOI: 10.1134/S0869864324060258

Q. Zhang, Y. Guo, T. Liu, W. Zhao, S. Qiu, X. Lü

{"title":"Research on nitrogen reduction performance of various modes combined air-staged with air humidification for gas boiler","authors":"Q. Zhang, Y. Guo, T. Liu, W. Zhao, S. Qiu, X. Lü","doi":"10.1134/S0869864324060258","DOIUrl":"10.1134/S0869864324060258","url":null,"abstract":"<div><p>NO<sub><i>x</i></sub> emissions from gas boilers pose a significant threat to air quality. To significantly decrease NO<sub><i>x</i></sub> emission level from the gas boiler exhaust, a novel nitrogen reduction combustion method is proposed that combines air-staging with humidification combustion techniques. A comprehensive study was conducted using CHEMKIN software to analyse the nitrogen reduction performance and sensitivity in various compound modes. The impact of combustion temperature, excess air coefficient, and injection position of over-fire air on the nitrogen reduction performance in the optimal compound mode was investigated. The results showed that the nitrogen reduction effect of the compound mode was better than that of the pure staged combustion mode. Compared with pure staged combustion, humidifying the main combustion zone could improve the nitrogen reduction rate by 4.9 %, which was 1.7 % higher than humidifying the burnout zone. The most significant nitrogen reduction effect was achieved when both combustion zones were humidified, leading to a 7.4 % increase in the nitrogen reduction rate. Further, by humidifying both combustion zones and reducing the combustion temperature, the emission of NO during boiler operation was found to be reduced significantly. The nitrogen reduction rate can be increased to 65.7 %, which is 22.1 % higher than that of the single air-staging.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"31 6","pages":"1349 - 1366"},"PeriodicalIF":0.6,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145178","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Control of transonic buffet by trailing-edge buffet breather 后缘缓冲呼吸器控制跨声速缓冲

IF 0.6 4区工程技术

Thermophysics and Aeromechanics Pub Date : 2025-07-25 DOI: 10.1134/S0869864324060222

J. Lei, B. Zhang, J. Niu

{"title":"Control of transonic buffet by trailing-edge buffet breather","authors":"J. Lei, B. Zhang, J. Niu","doi":"10.1134/S0869864324060222","DOIUrl":"10.1134/S0869864324060222","url":null,"abstract":"<div><p>In transonic flight, the phenomenon of transonic buffet arises due to the shock-wave/boundary-layer interaction. To mitigate the effects of transonic buffet while maintaining the lift-drag ratio, a passive buffet control approach utilizing a trailing-edge buffet breather is proposed, based on an analysis of the pressure distribution on a supercritical airfoil. The control effect of the trailing-edge buffet breather and its correlation with breather width, outlet position, and freestream Mach number are analyzed with the unsteady Reynolds-averaged Navier–Stokes (URANS) method on the OAT15A airfoil. Findings suggest that the separation flow behind the shock wave on the suction side of the airfoil is isolated from the separation region at the trailing edge by the buffet breather, impeding the fusion and interaction of these flows and thereby suppressing the transonic buffet. The control effectiveness of the buffet breather can be substantial when the outlet is positioned appropriately downstream of the shock wave. A wider breather width results in a stronger jet intensity, improving control of flow field unsteadiness but with a trade-off of increased lift loss. Furthermore, the control method exhibits efficacy at various Mach numbers, with minimal impact on lift-drag characteristics.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"31 6","pages":"1293 - 1313"},"PeriodicalIF":0.6,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145144837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Gas-jet synthesis of diamond coatings on silicon substrates 硅衬底上金刚石涂层的气喷合成

IF 0.6 4区工程技术

Thermophysics and Aeromechanics Pub Date : 2025-07-25 DOI: 10.1134/S0869864324060040

A. A. Emelyanov, M. Yu. Plotnikov, N. I. Timoshenko, I. B. Yudin

引用次数: 0

Research on flow and heat transfer similarity of laminated cooling structure based on overall cooling effectiveness 基于整体冷却效果的层叠冷却结构流动传热相似性研究

IF 0.6 4区工程技术

Thermophysics and Aeromechanics Pub Date : 2025-07-25 DOI: 10.1134/S0869864324060234

C. Wang, C. H. Wang, J. Z. Zhang

{"title":"Research on flow and heat transfer similarity of laminated cooling structure based on overall cooling effectiveness","authors":"C. Wang, C. H. Wang, J. Z. Zhang","doi":"10.1134/S0869864324060234","DOIUrl":"10.1134/S0869864324060234","url":null,"abstract":"<div><p>Considering that the experimental investigations are generally conducted under conventional pressure and temperature conditions, to make the research results applied reasonably under practically high-pressure and high-temperature environment wherein the hot-section component works, a similarity theory was conducted on the laminated cooling structure to observe its overall cooling effectiveness on the hot-side surface. Based on the simplified one-dimensional heat transfer model of film cooling plate, a corresponding similar relationship for the overall cooling effectiveness was established. From this similarity relationship, the main non-dimensional parameters were deduced and analyzed, including the adiabatic cooling effectiveness, hot-side Biot number, hot-side Nusselt number, and the ratio of convective heat transfer coefficient. By reasonably selecting the characteristic scale and the material thermal conductivity of the tested model, a similarity strategy method was proposed to ensure that the overall cooling effectiveness measured under experimental and actual working conditions is approximately the same. The above-mentioned approach similarity strategy was numerically validated through two randomly-selected groups of laminated cooling structures.</p></div>","PeriodicalId":800,"journal":{"name":"Thermophysics and Aeromechanics","volume":"31 6","pages":"1315 - 1332"},"PeriodicalIF":0.6,"publicationDate":"2025-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145145177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","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 pulsating flow in a rectangular channel 矩形通道内脉动流动的实验研究

IF 0.6 4区工程技术

Thermophysics and Aeromechanics Pub Date : 2025-07-25 DOI: 10.1134/S0869864324060027

N. A. Nazarov, A. S. Gerasimov, V. V. Terekhov, V. I. Terekhov

引用次数: 0

Application of spectral approach to the analysis of laser visualization of the boundary layer on a flat plate 光谱法在平板边界层激光可视化分析中的应用

IF 0.6 4区工程技术

Thermophysics and Aeromechanics Pub Date : 2025-07-25 DOI: 10.1134/S0869864324060052

Yu. V. Gromyko, I. S. Tsyryulnikov

引用次数: 0