Numerical investigation of heat transfer enhancement in helically coiled specifically-shaped tube heat exchangers

P Xu, T Zhou, J Xing, Z Fu - Nuclear Engineering and Design, 2022 - Elsevier
The shape of helically coiled tube (HCT) has a profound effect on the heat transfer capability
of HCT heat exchangers (HEs). In this study, the thermo-hydraulic characteristics of two …

[HTML][HTML] Effect of volume fraction and size of Al2O3 nanoparticles in thermal, frictional and economic performance of circumferential corrugated helical tube

H Wei, H Moria, KS Nisar, R Ghandour… - Case Studies in Thermal …, 2021 - Elsevier
The economic and operational constraints are the most important ones when it comes to
decide to use any performance enhancement method. In this paper, the effect of Al 2 O 3 …

Numerical investigation on heat transfer characteristics of liquid metal cross flow over tube bundles

X Xie, H Zhao, X Li, X Wu, F Niu - Annals of Nuclear Energy, 2023 - Elsevier
Abstract Helical tube Once Through Steam Generator (OTSG) could further improve the
compactness of liquid metal cooled reactors. The heat transfer characteristics of liquid metal …

Friction factor and Nusselt number correlations for forced convection in helical tubes

H Zhao, X Li, Y Wu, X Wu - International Journal of Heat and Mass Transfer, 2020 - Elsevier
Helical tubes are widely used in heat exchangers in various industries. Due to the
secondary flow caused by centrifugal forces, flow and heat transfer characteristics in helical …

Numerical investigation on the thermal load heterogeneity of multi-assembly helical coil steam generator in high temperature gas-cooled reactor

K Liu, M Wang, J Zhang, K Guo, W Tian, S Qiu, GH Su - Energy, 2023 - Elsevier
The thermal load heterogeneity will lead to inhomogeneous local heat flux and thermal
stress, extremely detrimental to the operational stability of heat exchangers with multi …

Frictional pressure drop correlation of steam-water two-phase flow in helically coiled tubes

Y Su, X Li, X Wu - Annals of Nuclear Energy, 2024 - Elsevier
Helically coiled tubes are utilized as the heat transfer tubes for High-Temperature Gas-
cooled Reactor (HTGR) steam generators due to their compactness, thermal expansion …

Two-phase flow instability characteristics of HTGR Once Through Steam Generators

Y Su, X Li, X Wu - Nuclear Engineering and Design, 2023 - Elsevier
Abstract High Temperature Gas-cooled Reactors (HTGR) have the advantage of inherent
safety compared with most Gen III reactors. They also have very high temperature, which …

Experimental investigation and analysis on the cross flow characteristics over inline tube bundles with S/D= 1.875

X Xie, A Ma, H Zhao, X Li, X Wu - International Journal of Heat and Mass …, 2023 - Elsevier
Helical tube bundles are usually used for steam generators (SGs) and intermediate heat
exchangers (IHXs) of High Temperature Gas-cooled Reactors (HTGRs). The thermal …

Three-dimensional thermal–mechanical analysis of helical coil once-through steam generator

W Li, J Liu, C Wang, B Wang, S Qiu, GH Su… - Applied Thermal …, 2024 - Elsevier
To ensure the safety and efficiency of steam generators, it is crucial to understand the
distribution of thermal and mechanical parameters. Excessive gradients in the distribution of …

Flow topology and turbulent characteristics of cross flow over a wall bounded inline tube bundle with small pitch to diameter ratio

X Xie, H Zhao, A Ma, X Li, X Wu - Applied Thermal Engineering, 2025 - Elsevier
The characteristics of cross flow over tube bundles with small pitch to diameter ratios (S/D)
are preferable for intermediate heat exchangers (IHXs) of High Temperature Gas-cooled …