Conjugate heat transfer simulations of a radially cooled gas turbine blade leading edge using a vortex-based fluidic oscillator for sweeping jet impingement DOI

Arshad Farooq,

Shaowen Chen,

Yimin Zhang

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(11)

Published: Nov. 1, 2024

The turbine blades of aero engines are subjected to extremely high temperatures, particularly at the leading edge, where temperatures can reach approximately 1800–2000 K. Therefore, effective heat load management is crucial. A vortex-based fluidic oscillator for sweeping jet impingement was proposed as an innovative cooling method enhance transfer edge high-pressure gas blades. This numerical investigation evaluates performance a compared steady and conventional jets in radially cooled blade. In this study, conjugate model based on three-dimensional unsteady Reynolds-averaged Navier–Stokes (URANS) equations employed. shear stress transport (SST k–ω) specifically selected predict flow field characteristics applied edge. To verify accuracy calculations, two sets experimental data were used benchmark. results demonstrated strong qualitative quantitative agreement with data. Various parameters, including coolant mass rates (0.171, 0.514, 0.857 g/s), aspect ratios (0.5, 0.65, 1), jet-to-wall spacings (H/D = 2, 4, 6), pressure drop, examined assess overall effectiveness performance. Time-averaged time-resolved measurements revealed that significantly enhanced effects covered larger impinging area jet. Notably, achieved 24.3% higher than H/D average temperature decrease 21 K

Language: Английский

Performance enhancement of supersonic ejectors via aerodynamic cavities: A numerical parametric study DOI

Mohammad Ali Talebiyan,

Mahdi Nili-Ahmadabadi, Man Yeong Ha

et al.

Journal of Mechanical Science and Technology, Journal Year: 2025, Volume and Issue: 39(1), P. 259 - 274

Published: Jan. 1, 2025

Language: Английский

Citations

0
Coupling mechanism of structure–cavitation impact in reflux self-excited oscillating nozzles DOI

Lianan Wang,

Wei Wu,

Xiuneng Li

et al.

Ocean Engineering, Journal Year: 2025, Volume and Issue: 332, P. 121355 - 121355

Published: May 3, 2025

Language: Английский

Citations

0
Heat transfer enhancement on a concave surface using sweeping impinging jets: Comparison of vortex-based and conventional oscillators DOI Creative Commons

Mohammad Rezaei,

Mahdi Nili-Ahmadabadi, Mehdi Tavakoli

et al.

Case Studies in Thermal Engineering, Journal Year: 2024, Volume and Issue: 60, P. 104738 - 104738

Published: June 24, 2024

While the impinging sweeping jet generated by a conventional fluidic oscillator has been extensively investigated for its remarkable convective heat transfer performance, cooling performance of recently designed vortex-based on impinged hot plates remains unexplored. This study numerically investigates oscillatory jets compared to and steady non-oscillatory concave surface. The Fluent 2023R2 software was employed solving unsteady Reynolds-averaged Navier–Stokes equations with k–ω SST model through finite volume method. Numerical simulations were conducted at various dimensionless nozzle-to-surface distances (X/D = 2, 4, 6) Reynolds numbers (20,000, 30,000, 40,000). performances both oscillators assessed time-averaged velocity, temperature, Nusselt number. results demonstrated that oscillator, as an innovative type outperformed enhancing reducing pressure drop, attributed smaller size higher operational frequency. At X/D values 6, mean number exhibited respective increases 19%, 23%, 16% oscillator. In addition, these respectively 38%, 34%, 24% than those jet. Furthermore, thermal enhancement factor 20%, 21%, respectively, in comparison These findings suggest novel holds significant promise replacing industrial applications.

Language: Английский

Citations

3
Conjugate heat transfer simulations of a radially cooled gas turbine blade leading edge using a vortex-based fluidic oscillator for sweeping jet impingement DOI

Arshad Farooq,

Shaowen Chen,

Yimin Zhang

et al.

Physics of Fluids, Journal Year: 2024, Volume and Issue: 36(11)

Published: Nov. 1, 2024

The turbine blades of aero engines are subjected to extremely high temperatures, particularly at the leading edge, where temperatures can reach approximately 1800–2000 K. Therefore, effective heat load management is crucial. A vortex-based fluidic oscillator for sweeping jet impingement was proposed as an innovative cooling method enhance transfer edge high-pressure gas blades. This numerical investigation evaluates performance a compared steady and conventional jets in radially cooled blade. In this study, conjugate model based on three-dimensional unsteady Reynolds-averaged Navier–Stokes (URANS) equations employed. shear stress transport (SST k–ω) specifically selected predict flow field characteristics applied edge. To verify accuracy calculations, two sets experimental data were used benchmark. results demonstrated strong qualitative quantitative agreement with data. Various parameters, including coolant mass rates (0.171, 0.514, 0.857 g/s), aspect ratios (0.5, 0.65, 1), jet-to-wall spacings (H/D = 2, 4, 6), pressure drop, examined assess overall effectiveness performance. Time-averaged time-resolved measurements revealed that significantly enhanced effects covered larger impinging area jet. Notably, achieved 24.3% higher than H/D average temperature decrease 21 K

Language: Английский

Citations

0