Results 71 to 80 of about 874 (207)

Achieving 85% Thermal Efficiency: Numerical Performance Analysis of a Solar Air Heater With Curved‐Leg Divided Triangular Tubes

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
This article proposes and numerically analyzes a high‐performance solar air heater (SAH) featuring a novel absorber configuration with curved‐leg triangular tubes (CLTTs) under an impingement‐return flow arrangement. The key innovation lies in the tube’s cross‐section, which approximates a triangle with two curved arc‐shaped legs, internally divided by
S. A. Gandjalikhan Nassab, Mahmoud Ahmed
wiley   +1 more source

A Novel Tubular Solar Air Heater With Internal Plates: A CFD Study on Segregated Impingement Flow

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
This paper presents a numerical analysis of a novel and efficient solar air heater (SAH) designed with an integrated impingement‐return configuration to enhance thermal performance. The system consists of nine blackened copper tubes where incoming air first passes through the lower half of each tube. At the far end, the flow reverses direction in a 180°
S. A. Gandjalikhan Nassab, Fatemeh Boshagh   +1 more
wiley   +1 more source

A New Mathematical Model for Flow and Heat Transfer of Dual‐String Steam Injection in SAGD

Geofluids, Volume 2026, Issue 1, 2026.
Uneven steam distribution along horizontal wellbores, particularly the disparity between the heel and toe, poses a significant challenge in steam injection for heavy oil recovery. This often leads to asymmetric steam chamber development and premature steam channeling, severely limiting process efficiency.
Qiuying Du, Lili Cao, Wenfang Song, Mengyun Zhao, Hang Xu, Chuxiao Miao, Qingjun Du, Pramita Mishra   +7 more
wiley   +1 more source

Analysis of air impact on aircraft engine lubrication system performance

Авіаційно-космічна техніка та технологія
A distinctive feature of an aircraft gas turbine engine (GTE) oil system is that an oil-air mixture, rather than pure oil, circulates through almost all of its components.
Taras Mykhailenko, Oleksandr Goridko, Illia Petukhov   +2 more
doaj   +1 more source

Analysis of Temperature and Displacement Fields in the Freeze Construction of Overlapping Cross‐Passages Within Water‐Rich Sand Layers

Geofluids, Volume 2026, Issue 1, 2026.
In the construction of an F‐type cross‐passage in an overlapping‐type shield tunnel using the artificial ground freezing method, the development of the distal frozen wall is difficult to control, and ground deformation is influenced by the superimposed disturbance of successive construction steps. Existing studies are insufficient to fully characterize
Jinlei Li, Zixuan Zhang, Xueqing Xu, Gan Cheng, He Yongliang   +4 more
wiley   +1 more source

sj-docx-1-pie-10.1177_09544089231157977 - Supplemental material for Effect of pitch and hole-hydraulic depth of perforated V-shaped baffles on the heat transfer and thermohydraulic performance of an air heater duct

, 2023
Supplemental material, sj-docx-1-pie-10.1177_09544089231157977 for Effect of pitch and hole-hydraulic depth of perforated V-shaped baffles on the heat transfer and thermohydraulic performance of an air heater duct by Rajeev Pandey in Proceedings of the ...
Rajeev Pandey (14717630)
core   +1 more source

Numerical Investigation of Heat Transfer Rate Improvement in Heat Exchangers Utilizing Innovative Wavy Vortex Generators

Modelling and Simulation in Engineering, Volume 2026, Issue 1, 2026.
Quick‐cooling heat exchangers are used for a wide range of industrial applications. This study is aimed at employing the wavy surfaces of the vortex generators to reduce pressure drops and enhance heat transfer performance. The turbulent conditions for mixture (water and air) flow with Rew = 3500–5000.
Adnan Q. Ibrahim, Riyadh S. Alturaihi, Dimitris Drikakis   +2 more
wiley   +1 more source

Technoeconomic optimization and thermohydraulic characterization of superalloy supercritical CO2 microtube shell-and-tube heat exchangers [PDF]

, 2022
High-temperature supercritical CO2 Brayton cycles are promising candidates for future stationary power generation and hybrid electric propulsion applications.
Krishna, Akshay Bharadwaj
core  

Influence of Layering and Curie Temperature Uncertainty on the Performance of Multilayer Active Magnetic Regenerators

Advanced Functional Materials, Volume 35, Issue 52, December 23, 2025.
This study examines how manufacturing uncertainties in Curie temperatures (1.5–2°C) affect multilayer active magnetic regenerators (AMR). While increasing the number of magnetocaloric layers boosts cooling power, performance degrades due to temperature variations.
Urban Tomc, Guilherme F. Peixer, Christian R. H. Bahl, Kaspar K. Nielsen, Jaime A. Lozano, Jader R. Barbosa, A. Kitanovski   +6 more
wiley   +1 more source

Heat transfer and flow characteristics in horizontal spiral coils with flat tubes and rectangular ribs: CFD and optimization

International Journal of Thermofluids
The present work focuses on the analysis of heat transfer and flow characteristics in a horizontal spiral coil with rectangular ribbed flat tubes. The influence of Reynolds numbers (Re) ranging from 3000 to 12,000, relative rib height (Hn) from 0.04 to 0.
Luan Nguyen Thanh, Minh Ha Nguyen
doaj   +1 more source