Results 71 to 80 of about 2,662 (201)

Numerical Simulation and Experimental Study of Thermal Performance in Double‐Pass Solar Water Heaters With Paraffin Wax Storage

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
Solar water heaters are widely used to convert solar energy into thermal energy for residential, commercial, and industrial applications. This study investigates the thermal performance of a double‐pass solar water heater (DPSWH) using numerical and experimental approaches under different water mass flow rates.
Lan Zhang, Muhammad Waqas, Lun Zhao, Zeshan Abbas, Jiajin Zhang, Muhammad Imran, Hafiz Muhammad Shahzad   +6 more
wiley   +1 more source

Impact of Leading and Trailing‐Edge Perforations on the Thermohydraulic Performance of Rectangular‐Winglet Vortex Generators

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
In this study, the thermohydraulic performance of rectangular‐winglet vortex generators (VGs) with different hole configurations (a central hole, dual‐edge holes, a leading‐edge hole, and a trailing‐edge hole) was numerically investigated. In addition, airflows through solar air heater ducts enhanced with these VGs were simulated using the realizable k‐
Roytor Charoensin-O-Larn, Boonchai Lertnuwat, Naveen Sharma   +2 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

Thermo‐Hydraulic Performance Evaluation of Tapered Dual‐Plane Twisted Tapes by Sequential Geometry Selection: CFD Analysis With ML‐Assisted Data‐Driven Prediction

International Journal of Energy Research, Volume 2026, Issue 1, 2026.
This study investigates dual‐plane rectangular‐cut twisted‐tape (DP‐RCTT) inserts for enhancing heat transfer in heated tubes through sequential geometry selection, including secondary‐axis thickness, rotational sense, and taper angle, under turbulent flow over the overall Reynolds number range of Re = 5000–14,000.
Mohammad Rafat Islam, Dipayan Mondal, A. S. M. Jubayer Mufid, Cheng Du   +3 more
wiley   +1 more source

Impact of roughness parameters on heat transfer and fluid flow behaviour of solar thermal air collector: CFD-based analysis

Case Studies in Thermal Engineering
In this investigation, the Nusselt number and friction factor characteristics of a solar thermal air collector that incorporates S-shaped ribs roughness on the absorber plate are examined.
Khushmeet Kumar, Sashank Thapa, Deoraj Prajapati, Sushant Samir, Raj Kumar, Tej Singh   +5 more
doaj   +1 more source

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

Thermohydraulic modeling and simulation of breeder reactors [PDF]

, 1982
This paper deals with the modeling and simulation of system-wide transients in LMFBRs. Unprotected events (i.e., the presumption of failure of the plant protection system) leading to core-melt are not considered in this paper. The existing computational capabilities in the area of protected transients in the US are noted. Various physical and numerical
Agrawal, A. K., Khatib-Rahbar, M., Curtis, R. T., Hetrick, D. L., Girijashankar, P. V.   +4 more
openaire   +2 more sources

Thermohydraulic performance of some ribbed surfaces and their choice for GCFR

, 1976
In this report the thermohydraulic performances of several types of artifically roughened surfaces provided for use in GCFR have been investigated experimentally and compared. The tests were performed with air in an annular test rig.
Hudina, M. (author)
core   +1 more source

Study of reactor plant disturbed cooling condition modes caused by the VVER reactor secondary circuit

Nuclear Energy and Technology, 2016
Based on the equations of energy, mass and momentum conservation for the three-dimensional unsteady flow of the two-phase mixture, simulations were made of reactor plant disturbed cooling condition modes caused by the VVER secondary circuit using ...
V.I. Belozerov, E.N. Botko, M.M. Zhuk
doaj   +1 more source