Parametric modeling method for integrated design and manufacturing of radial compressor impeller

Zhou, Yu; Song, Yue; Xing, Tong; Wang, Yan; Zhang, Qi; Shao, Longtao; Du, Feng; Ding, Shuiting

doi:10.1007/s00170-020-06331-5

Cited by 7 publications

(4 citation statements)

References 50 publications

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“…In this paper, a stronger FRIV was constructed on the basis of the influence of geometric parameter changes on entropy production [51,52], which is defined as the best; the geometric parameters are shown in Table 5. The best entropy generation was studied and compared with the initial FRIV.…”

Section: Influence Of Friv Strength On Leakagementioning

confidence: 99%

Investigation on the Formation and Evolution Mechanism of Flow-Resistance-Increasing Vortex of Aero-Engine Labyrinth Based on Entropy Generation Analysis

et al. 2022

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Labyrinth seals are widely employed in the air system of aircraft engines since they reduce the leakages occurring between blades and shrouds, which affect the entropy generation significantly. Excessive leakage flow of the labyrinth may be reduced the efficiency and performance of the engine. This paper proposes the concept of flow-resistance-increasing vortex (FRIV) on the top of the labyrinth that is based on the flow entropy generation mechanism of the stepped labyrinth and the main flow characteristics that lead to entropy generation. A three-dimensional simulation model of the labyrinth structure was established, and the model was compared and verified with the experimental data of the reference. The relative dissipation strength and vorticity distribution of the FRIV were theoretically analyzed. It was confirmed that the dissipative intensity distribution was the same as the vorticity distribution, and the correlation coefficient was larger in the labyrinth tip region. Therefore, a parametric study was conducted on design parameters related to the FRIV, including the teeth inclined angle, tooth crest width, step inclined angle, and other parameters. The results are beneficial for the construction of a stronger FRIV to reduce the leakage. This research is of great significance for the improvement of engine efficiency and for the reduction of fuel consumption in the future.

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Section: Influence Of Friv Strength On Leakagementioning

confidence: 99%

Investigation on the Formation and Evolution Mechanism of Flow-Resistance-Increasing Vortex of Aero-Engine Labyrinth Based on Entropy Generation Analysis

et al. 2022

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“…For specific mechanical components such as aircraft engine blades, nonlinear structural interactions constitute a major roadblock for designers for two reasons: (1) aircraft engine blades feature several nonlinear interfaces [6,7], which makes it extremely difficult to accurately predict their dynamics [3,8], and (2) the recent drive towards the reduction of aircraft engines' environmental footprint imposes design constraints, that makes it essential to account for nonlinear structural interactions which may now occur in non-accidental configurations [9,10]. In this context, new design tools and methodologies [11,12] are required to design blades more robust to nonlinear structural interactions.…”

Section: Introductionmentioning

confidence: 99%

“…This paper focuses specifically on nonlinear structural interactions that may arise following blade-tip/casing contacts within an aircraft engine compressor [12,15]. Mitigating such interactions at the compressor stage is indeed strategic for engineers as it is inherently tied to the reduction of nominal operating clearances which prevents parasitic leakage flows.…”

Section: Introductionmentioning

confidence: 99%

Methodology for the Redesign of Compressor Blades Undergoing Nonlinear Structural Interactions: Application to Blade-Tip/Casing Contacts

Kojtych

Nyssen

Audet

et al. 2022

Journal of Engineering for Gas Turbines and Power

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Over the past decade, the drive towards more efficient aircraft engines has pushed the boundaries of operating ranges far beyond a linear structural context. Nonlinear interfaces, such as blade-tip/casing contacts, are to be expected in nominal operating conditions. However, current blade design methodologies still rely on empirical structural considerations, often linear, which may lead to costly redesign operations. This work aims at proposing a methodology for the redesign of blades undergoing nonlinear structural interactions. A three-step redesign process is considered: (1) parameterization of an existing blade, (2) update of blade parameters with respect to a surrogate performance criterion and (3) performance check of the optimized blade. An original two-way parameterization method is proposed to parameterize existing blades and generate models from blade parameters. As a proof-of-concept, the redesign of the NASA compressor blade rotor 37 and fan blade rotor 67 with respect to blade-tip/casing contacts is considered. High-fidelity parameterized models of the initial blades are obtained and their dynamic response to contact interactions are analyzed. Geometries are updated with respect to their clearance consumption, as its minimization has shown beneficial effects on the considered contact interactions. The proposed methodology allows to better assess the relevance of this performance criterion in the context of blade-tip/casing contacts.

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“…With improvements to the flight envelope of APEs, the requirements for superchargers are also increasing [8,9]. BFJBs are selected for the turbocharger rotor system of APEs due to their high-speed stability and reliability [10,11]. The main parameters for evaluating BFJBs include lift-off speed, friction torque, and temperature characteristics, which significantly affect the performance of BFJBs.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Investigation into the Thermal Characteristics of Bump Foil Journal Bearings

et al. 2022

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Bump foil journal bearings (BFJBs) are widely used in the superchargers of aviation piston engines (APEs). This paper proposes a method to evaluate the operating state of superchargers by monitoring the bearing temperature. A numerical model with a repeating symmetrical structure in the axial direction is established based on a certain type of supercharger, which solves the temperature field of BFJBs with the non-isothermal Reynolds equation and energy equation. It can be used to analyze the effect of thermal expansion on lift-off speed and stop-contact speed. A new test rig and six various BFJBs were designed to check the temperature characteristics of the BFJBs with variable load and speed. By comparing the numerical results with the experimental results, it was shown that the air film temperature increased almost linearly with the increase in bearing load and speed. However, the temperature increase caused by the rotation speed was significantly greater than the load. The structural parameters of the BFJB affected the bearing support stiffness, which had a nonlinear effect on the lift-off speed and air film temperature. Therefore, the proposed method to evaluate the state of superchargers with BFJBs was effective. These thermal characteristics can be used to guide BFJB design and predict the life cycle of BFJBs.

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Parametric modeling method for integrated design and manufacturing of radial compressor impeller

Cited by 7 publications

References 50 publications

Investigation on the Formation and Evolution Mechanism of Flow-Resistance-Increasing Vortex of Aero-Engine Labyrinth Based on Entropy Generation Analysis

Investigation on the Formation and Evolution Mechanism of Flow-Resistance-Increasing Vortex of Aero-Engine Labyrinth Based on Entropy Generation Analysis

Methodology for the Redesign of Compressor Blades Undergoing Nonlinear Structural Interactions: Application to Blade-Tip/Casing Contacts

An Experimental Investigation into the Thermal Characteristics of Bump Foil Journal Bearings

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