Effect of Hysteresis in Axial Compressors of Gas-Turbine Engines

Кulyk, Mykola; Lastivka, Ivan; Tereshchenko, Yuri

doi:10.3846/16487788.2012.753679

Cited by 8 publications

(3 citation statements)

References 3 publications

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“…Zheng proposed a reasonable tolerance allocation strategy based on the joint game theory, which found a balance point for each assembly component to weigh the assembly cost and assembly quality [11]. For rotationally symmetrical aero-engine components, to control the tolerance transfer process in the assembly process, Klocke proposed a set of intelligent assembly system, which can realize the automatic distribution of disklike components with the center as the installation reference and meet certain tolerance requirements [12][13][14].…”

Section: Quick Browse and Highlightmentioning

confidence: 99%

Assembly accuracy prediction and optimization of aero-engine rotor under the separation condition of assembly and measurement

Wang

Sun

et al. 2022

Int J Adv Manuf Technol

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The measurement and assembly of aeroengine rotor are separated from each other, the uncertainty of the test position leads to the test data cannot reflect the geometric characteristics of the rotor itself, which makes it difficult to accurately measure and predict the assembly accuracy. Combined with the fact that the 2 geometric characteristics of parts / components are not related to the measurement datum, an assembly accuracy test and prediction method is proposed to reduce the datum deviation and ensure the consistency of test data. Firstly, the small displacement torsor is used to describe the datum deviation, the inverse matrix transformation is applied to reduce the datum deviation, and the datum independent matrix is utilized to express the pose characteristics of the parts / components, which provides the data basis for the accurate prediction of assembly accuracy. Then, the pose transfer model based on the datum independent matrix is established, which is more comprehensive and clearer than the traditional accuracy prediction model. Furthermore, a direct optimization method is also established, which is more efficient than the traditional genetic algorithm. The assembly experiment of aeroengine rotor shows that the model and method proposed in this paper are beneficial to reduce the coaxiality of the front and rear fulcrum and they can better reflect the geometric characteristics of the rotor itself. The related research also has reference significance for other large-scale and high-precision mechanical product assembly.

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Section: Quick Browse and Highlightmentioning

confidence: 99%

Assembly accuracy prediction and optimization of aero-engine rotor under the separation condition of assembly and measurement

Wang

Sun

et al. 2022

Int J Adv Manuf Technol

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“…Their work showed that if the velocity of the gas entering the chamber increases (To a certain extent), the efficiency of the straight VT cyclone separator can be improved. The separated flow hysteresis phenomenon in the process of the streamlining the gas-turbine engines axial compressor is analyzed by Kulyk et al (2012). The accuracy of different turbulence models in prediction of separation phenomenon has been analyzed by Rafiee and Sadeghiazad (2016b).In order to increase the energy separation rate and the thermal efficiency, and optimize the dimensions of the straight VT cyclone separator system, thereby decreasing the operating costs, the geometrical optimization techniques are usually applied.…”

Section: Frontiers In Heat and Mass Transfermentioning

confidence: 99%

Experimental and 3d-CFD Study on Optimization of Control Valve Diameter for a Convergent Vortex Tube

Rafiee¹,

Mohammadkhani²

2016

Frontiers in Heat and Mass Transfer

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The aim of this investigation is study on separation phenomenon inside a special vortex tube affected by structural and physical factors including; throttle diameter, nozzle number and injection pressure as well as the parametric optimization based on separation efficiency using experimental and 3D-CFD methods. The results show that convergent VT with Dth=5.5mm provides 30.01% and 20.04% higher cooling and heating effectiveness compared to basic model. As another result, the higher injection pressure, the higher cooling effectiveness. The cooling effectiveness improves (16.86%) with increase in slot number up to N=4, then decreases. The maximum disagreement between experimental and predicted values is 6.25%.

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“…Furthermore, in the assembly of propellant tanks in spacecraft, gas turbines and aero-engine components, most parts are rotationally symmetric cylindrical components (Griffin et al, 2003;Kulyk et al, 2012;Papastathis et al, 2010). To control the tolerance propagation in the assembly of cylindrical components, much work had been done.…”

Section: Introductionmentioning

confidence: 99%

Improvement of location and orientation tolerances propagation control in cylindrical components assembly using stack-build assembly technique

Wang

Sun

Tan

et al. 2015

Assembly Automation

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2015),"Auto-body assembly process fault diagnosis based on a dynamic variation modeling approach", Assembly Automation, Vol. 35 Iss 4 pp. 302-308 http://dx. Access to this document was granted through an Emerald subscription provided by emerald-srm:368933 [] For AuthorsIf you would like to write for this, or any other Emerald publication, then please use our Emerald for Authors service information about how to choose which publication to write for and submission guidelines are available for all. Please visit www.emeraldinsight.com/authors for more information. About Emerald www.emeraldinsight.comEmerald is a global publisher linking research and practice to the benefit of society. The company manages a portfolio of more than 290 journals and over 2,350 books and book series volumes, as well as providing an extensive range of online products and additional customer resources and services.Emerald is both COUNTER 4 and TRANSFER compliant. The organization is a partner of the Committee on Publication Ethics (COPE) and also works with Portico and the LOCKSS initiative for digital archive preservation. AbstractPurpose -This paper aims to provide an assembly method to improve cylindrical components assembly quality. The proposed method not only could be applied to tolerance allocation, but also could guide the assembly of cylindrical components. Design/methodology/approach -The paper claims to provide a stack-build assembly method using a connective assembly model to take the location and orientation tolerances of a rotor stage into account. Through the separate analysis of the location and orientation tolerances propagation process in the assembly, the quality of the final assembly of the rotationally symmetric cylindrical components assembly could be improved by properly selecting component orientations to minimize the eccentric deviation in the assembly. Findings -The effectiveness of the proposed stack-build assembly technique in improving the tolerance propagation in the assembly of cylindrical components was verified through experiments run with a measuring machine. A real aero-engine rotor was assembly using the proposed method; compared to the direct-build assembly technique, which had the component orientations without consideration, the stack-build assembly technique could be used to reduce the eccentric deviation in cylindrical components assembly by nearly 50 per cent. Originality/value -Different with the old methods, the new method defined the tolerances in detail, such as perpendicularity and angle of the lowest point, and could guide the assembly by the features of surfaces on different components. Through measuring the special tolerances of surfaces on the components, the best assembly angle for each component could be obtained.

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Effect of Hysteresis in Axial Compressors of Gas-Turbine Engines

Cited by 8 publications

References 3 publications

Assembly accuracy prediction and optimization of aero-engine rotor under the separation condition of assembly and measurement

Assembly accuracy prediction and optimization of aero-engine rotor under the separation condition of assembly and measurement

Experimental and 3d-CFD Study on Optimization of Control Valve Diameter for a Convergent Vortex Tube

Improvement of location and orientation tolerances propagation control in cylindrical components assembly using stack-build assembly technique

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