Team Paper Recommendation——Impact of Uniform Profile Tolerance on Aerodynamic Performance
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Article Information
Aerospace Science and Technology publishes articles related to aerospace research, fundamental.
1.Aerospace Science and Technology is a leading international journal dedicated to advancing research in aerospace engineering and related interdisciplinary fields. The journal serves as a platform for cutting-edge theoretical, experimental, and applied studies.
2.The journal covers a broad spectrum of topics, including aerodynamics, propulsion systems, flight dynamics, structural mechanics, materials science, avionics, space exploration technologies. It emphasizes innovation in design, computational modeling, and sustainable aerospace solutions.
Authors:YANG Guang (杨光), GAO Limin(高丽敏)*, TU Panan(涂盼盼), DAN Yue(但玥)
Keywords:cascade; profile tolerance; machining deviation; aerodynamic performance; eligibility; uncertainty quantification;
Citation Format:Guang Yang, Limin Gao, Panpan Tu, Yue Dan. Effects of uniform profile tolerance on aerodynamic performance eligibility of high subsonic cascade.[J].Aerospace Science and Technology, 2025, Volume 160. https://doi.org/10.1016/j.ast.2025.110028.
Article Download Link:https://www.sciencedirect.com/science/article/pii/S1270963825001002
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Research Background
The compressor is one of the core components of an aircraft engine, and its performance is continuously approaching the limits of high efficiency and high load. The pursuit of performance limits has led to an increasing dependence on the quality of blade profiles. However, machining errors are unavoidable. In engineering, profile tolerance is used to restrict the variation range of blade geometry, indirectly judging aerodynamic performance by assessing blade geometric eligibility.However, the geometric uncertainties within the tolerance range lead to uncertainties in aerodynamic performance, resulting in performance dispersion among compressors of the same batch. Therefore, it is necessary to start from the direct assessment of aerodynamic performance eligibility, to determine and select suitable profile tolerances to guide the machining of compressor blades by providing a range of performance variations.
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Research Content
This paper first proposes the concept of “performance tolerance” based on the actual situation of performance dispersion in the same batch of compressors, analogous to using profile tolerance to constrain the variation range of blade geometry. This is used to restrict the variation range of aerodynamic performance parameters. Based on the “performance tolerance” and the statistical distribution of aerodynamic performance parameters, the eligibility rate of compressor performance parameters is obtained.
Figure 1 Schematic Diagram of Performance Tolerance
This paper takes a high subsonic cascade as the research object, establishes a mathematical model characterizing the blade profile with random contour machining deviations within the profile tolerance range, and obtains the impact of uniform profile tolerance on the aerodynamic performance eligibility of the cascade using the uncertainty quantification method developed by the research team.
Figure 2 Discrete points of blade profile with random contour machining deviations within the profile tolerance range
(a)：i=0°
(b)：i=2.4°
(c)：i=4°
Figure 3 Profile tolerance 0.06mm, Total pressure loss coefficient statistical distribution and aerodynamic performance eligibility
(a)：Total pressure loss coefficient
(b)：Pressure ratio
Figure 4Aerodynamic parameter eligibility changes with profile tolerance variation
(a)： μ (Maiso)
(b)：σ (Maiso)
Figure 5 i=4°, the impact of profile tolerance on the statistical characteristics of isentropic Mach number distribution along the pressure surface
(a)： μ(H)
(b)：σ(H)
Figure 6 i=4°, the impact of profile tolerance on the statistical characteristics of shape factor distribution along the pressure surface
The results show that ensuring the aerodynamic performance eligibility at large positive angles of attack meets the requirements of “performance tolerance” will guarantee the performance eligibility requirements under design conditions. For a determined “performance tolerance”, there exists a “critical” profile tolerance, beyond which the actual profile tolerance cannot meet the performance eligibility requirements.
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Editor | XING Suwan
Reviewer | MAO Xiaocheng
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