Numerical study on hot streak migration characteristics of micro axial turbine

Xiang, Xin; Zhu, Jingde; Hu, Xiaoan; Xia, Chen; Lu, Hongbo

doi:10.1016/j.csite.2021.101606

Cited by 3 publications

(2 citation statements)

References 17 publications

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“…In China, Harbin Institute of Technology et al 77 conducted a study on the design of curved blades for axial turbines, focusing on the appropriate range of bending angles and identifying key parameters that impact the performance of the turbine through experiments 78 . Xiang et al 79 studied the numerical simulation of hot strip (HS) pattern on a miniature axial turbine to reveal the heat deposition and heat migration phenomena, and Figure 12 is the blade surface temperature. Structures of turbine components are receiving more and more attention, and researchers are increasingly focusing on health monitoring theory 80 .…”

Section: Main Core Componentsmentioning

confidence: 99%

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Exploring the application of digital twin in the field of micro turbine engine core components

Zhang

2023

Energy Science & Engineering

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The micro turbine engine (MTE) plays a vital role in the aerospace sector. However, traditional research and design models no longer suffice to accommodate the highly complex operating conditions of the MTE. Therefore, this paper briefly analyzes the concept and development process of digital twin technology and integrates it into the research and design of the MTE. This integration takes into account the recent leapfrog developments in information technology and digital intelligence technology. Utilizing digital twin technology to model the core components of the MTE allows for effective structural optimization, online monitoring, and timely problem detection in support of extending the overall lifespan of the engine. Multiple algorithms are used throughout the development, design, and usage phases of each component to merge into a cohesive whole, providing robust support for the MTE's overall development, production, and manufacturing. Digital twin technology facilitates accurate performance prediction, reliability evaluation, and advanced design optimization for the MTE. This, in turn, reduces the design cycle and research design cost more effectively. Lastly, we propose the future application and development trend of digital twin technology in the core components of the MTE.

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Section: Main Core Componentsmentioning

confidence: 99%

“…Temperature distribution of the blade surface 79 . (A) Temperature distribution of pressure side, (B) ISO surface of total temperature (1220K), and (C) temperature distribution of suction side.…”

Section: Main Core Componentsmentioning

confidence: 99%

Exploring the application of digital twin in the field of micro turbine engine core components

Zhang

2023

Energy Science & Engineering

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Effects of tip clearance height on hot-streak migration in high subsonic micro turbine

Zhu

Xiang

et al. 2023

Case Studies in Thermal Engineering

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Experimental and numerical studies on hot streak transportation and attenuation in a 1.5-stage turbine

Wang,

Zhang

et al. 2024

Physics of Fluids

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Research on multicomponent interactions in aero-engine design technology has gained significant attention. The presence of hot streak (HS) at the combustor exit is critical, as it affects the turbine aerodynamic performance and the heat transfer properties of the blades. This paper presents the design of a HS simulator for a 1.5-stage turbine rig, examining the transportation and attenuation mechanisms of HS at two circumferential clocking positions and temperature ratios. Numerical simulations were conducted using commonly employed two-equation turbulence models with varying turbulent Prandtl numbers (Prt). Results show that the choice of turbulence model and Prt value greatly influences the prediction precision of HS dissipation. The numerical method effectively predicts the HS attenuation levels at the exits of stator 1 (S1), rotor (R), and stator 2 (S2), while the radial migration of HS core is not well captured. The HS experiences an overall attenuation rate of 75%–85% in the 1.5-stage turbine. Both clocking positions and temperature ratios significantly impact the HS attenuation levels, although the extent of the effects varies across the three rows of blade. The HS core tends to migrate radially inward within the turbine stage, influenced by curvature, buoyancy, and secondary flow effects. The extent of these influences is still determined by the clocking positions, temperature ratios, and the specific blade rows.

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Numerical study on hot streak migration characteristics of micro axial turbine

Cited by 3 publications

References 17 publications

Exploring the application of digital twin in the field of micro turbine engine core components

Exploring the application of digital twin in the field of micro turbine engine core components

Effects of tip clearance height on hot-streak migration in high subsonic micro turbine

Experimental and numerical studies on hot streak transportation and attenuation in a 1.5-stage turbine

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