Unsteady Numerical Investigation on the Sealing Effectiveness and Flow Field in Different Rim Seal Geometries DOI Creative Commons
Qing-cai Zhang, Qinqin Wang, Xiao-Ming Tan

et al.

Aerospace, Journal Year: 2022, Volume and Issue: 9(12), P. 780 - 780

Published: Dec. 1, 2022

A rim seal is often used to prevent the ingress of high-temperature gas into turbine disk cavity and protect from damage. Based on overlapping (Seal-A), this paper proposes two more composite sealing structures (Seal-B Seal-C) show effects a deep in static modified platform rotating disk. Three-dimensional unsteady Reynolds-averaged Navier–Stokes equations shear stress transfer (SST) k-ω turbulence model were reveal flow field characteristics efficiency. The results that rotor–stator interaction plays dominant role outlet pressure, efficiency outflow area obtained by transient calculation lower than steady-state calculation. rise cooling air enhances reverse vortex cavity, cavity’s also improved. When ratio increases 0.6% 1.8%, at high radius 30%. shape produces new return part which improves shark nose Seal-C aggravates but cavity. In general, compared with Seal-A, Seal-B increased 13.5% 10%, respectively, 0.6%.

Language: Английский

Multi-position melting uniformity based on hot-air welding technology: Numerical simulation and experimental studies DOI
Yang Hong, Mingxing Zhang, Wei Zhang

et al.

International Journal of Thermal Sciences, Journal Year: 2025, Volume and Issue: 211, P. 109722 - 109722

Published: Jan. 21, 2025

Language: Английский

Citations

0
Multi-objective optimization design and performance evaluation of a novel flexure-based tri-axial servo cutting system DOI

Haiqiang Yu,

Jinguo Han, Shiyu Li

et al.

Journal of Manufacturing Processes, Journal Year: 2022, Volume and Issue: 84, P. 1133 - 1149

Published: Nov. 9, 2022

Language: Английский

Citations

11
Investigation on flow mechanism and impingement heat transfer performance of combined fluidic oscillators DOI
Yongjun Sang, Yong Shan, Jingzhou Zhang

et al.

Thermal Science and Engineering Progress, Journal Year: 2022, Volume and Issue: 37, P. 101564 - 101564

Published: Nov. 21, 2022

Language: Английский

Citations

7
Thermal-hydraulic characteristics of FLiBe in annuli with helical wire DOI
Yang Yang

International Journal of Mechanical Sciences, Journal Year: 2022, Volume and Issue: 243, P. 108056 - 108056

Published: Dec. 18, 2022

Language: Английский

Citations

7
CFD analysis of heat transfer enhancement by wall mounted flexible flow modulators in a channel with pulsatile flow DOI Creative Commons
Arpita Das, Fahim Tanfeez Mahmood,

Rabeya Bosry Smriti

et al.

Heliyon, Journal Year: 2023, Volume and Issue: 9(6), P. e16741 - e16741

Published: May 26, 2023

The aim of the present study is to explore heat transfer and pressure drop characteristics in a pulsating channel flow due wall-mounted flexible modulators (FFM). Cold air fashion forced enter through having isothermally heated top bottom walls with one/multiple FFMs mounted on them. dynamic conditions inflow are characterized by Reynolds number, non-dimensional pulsation frequency amplitude. Applying Galerkin finite element method an Arbitrary Lagrangian-Eulerian (ALE) framework, unsteady problem has been solved. Flexibility (10-4 ≤ Ca 10-7), orientation angle (60° θ 120°), location FFM(s) have considered this find out best-case scenario for enhancement. system analyzed vorticity contours isotherms. Heat performance evaluated terms Nusselt number variations across channel. Besides, power spectrum analysis thermal field oscillation along that FFM's motion induced performed. reveals single FFM flexibility = 10-5 90° offers

Language: Английский

Citations

4
Numerical Analysis of Transfer of Heat by Forced Convection in a Wavy Channel DOI Creative Commons
N.A. Madlool, Mohammed J. Alshukri, Ammar I. Alsabery

et al.

International Journal of Renewable Energy Development, Journal Year: 2022, Volume and Issue: 12(1), P. 155 - 165

Published: Nov. 5, 2022

Convective heat transfer of laminar forced convection in a wavy channel is studied this paper. Numerical simulations the 3D steady flow Newtonian fluid and characteristics are obtained by finite element method. The effects Reynolds number (10 ≤Re≤1000), oscillations (0 ≤N≤5) amplitude wall (0.05 ≤A≤0.2) on have been analyzed. results show that average Nusselt elevated as raised, showing high intensity transfer, result intensified inertial zones recirculation close to hot wall. rate increases about 0.28% with rise oscillations. In along surface, wave important factors. With an increment oscillations, maximal value velocity elevated, its minimal occurs when walls straight. impact dimensionless temperature tends be stronger compared An increase improves 0.91% equal 100. addition, 500, grows 1.1% rising amplitude.

Language: Английский

Citations

5
Reducing hot spot temperature through vibrating blade-driven winglets motion: Numerical exploration and experimental validation DOI
Jinqi Hu, Xiaolong Li, Yuanhong Fan

et al.

Applied Thermal Engineering, Journal Year: 2024, Volume and Issue: unknown, P. 125315 - 125315

Published: Dec. 1, 2024

Language: Английский

Citations

0
Unsteady Numerical Investigation on the Sealing Effectiveness and Flow Field in Different Rim Seal Geometries DOI Creative Commons
Qing-cai Zhang, Qinqin Wang, Xiao-Ming Tan

et al.

Aerospace, Journal Year: 2022, Volume and Issue: 9(12), P. 780 - 780

Published: Dec. 1, 2022

A rim seal is often used to prevent the ingress of high-temperature gas into turbine disk cavity and protect from damage. Based on overlapping (Seal-A), this paper proposes two more composite sealing structures (Seal-B Seal-C) show effects a deep in static modified platform rotating disk. Three-dimensional unsteady Reynolds-averaged Navier–Stokes equations shear stress transfer (SST) k-ω turbulence model were reveal flow field characteristics efficiency. The results that rotor–stator interaction plays dominant role outlet pressure, efficiency outflow area obtained by transient calculation lower than steady-state calculation. rise cooling air enhances reverse vortex cavity, cavity’s also improved. When ratio increases 0.6% 1.8%, at high radius 30%. shape produces new return part which improves shark nose Seal-C aggravates but cavity. In general, compared with Seal-A, Seal-B increased 13.5% 10%, respectively, 0.6%.

Language: Английский

Citations

1