Effect of flank angle and friction coefficient on contact stress of turbine rotor

Tao, Qing-bin; Chen, Anping; Xu, Hui

doi:10.1007/s11771-013-1674-9

Cited by 3 publications

(3 citation statements)

References 15 publications

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“…ANSYS also provides various techniques for dealing with diverse flow regimes and employing different physical models. 8…”

Section: Simulation Analysis Based On Ansysmentioning

confidence: 99%

Analysis of the valve positioner pilot valve hole plugging

Wang,

Yang

2024

Advances in Mechanical Engineering

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The valve positioner is an important supporting component of the regulating valve. The pilot valve is a crucial component of the valve positioner, and its major job is to reverse the gas route. The current lack of efficient solutions for internal pilot valve blockage is due to the unavoidable oil loss inside the positioner and the simple entry of external dust and other contaminants into the valve, resulting in oil blockage inside the pilot valve. The fault tree theory is utilized in this study to evaluate the reason of the pilot valve blockage problem, and it is coupled with 39 engineering factors in TRIZ theory to innovate the internal structure of the pilot valve using a contradiction matrix and 40 invention principles. The product’s dependability was then confirmed by fluid analysis using Ansys fluent.

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“…ANSYS also provides various techniques for dealing with diverse flow regimes and employing different physical models. 8…”

Section: Simulation Analysis Based On Ansysmentioning

confidence: 99%

Analysis of the valve positioner pilot valve hole plugging

Wang,

Yang

2024

Advances in Mechanical Engineering

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“…Actually the blades are fixed on the disk via contacting between blade roots and disk grooves. By static analysis, many researchers investigated the effects of different loads on macroscopic fretting variables, such as contact traction, slip and contact stresses over the dovetail interface (Anandavel and Prakash, 2011;Papanikos et al, 1998;Wu et al, 2013;Gallego et al, 2010;Sinclair et al, 2002). Qin et al (2006) adopted a more realistic way to compute frequencies of a blade by considering the contact behavior in the attachments directly.…”

Section: Introductionmentioning

confidence: 99%

Vibration response analysis of blade-disk dovetail structure under blade tip rubbing condition

Wang

Tai

et al. 2016

Journal of Vibration and Control

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A cyclic sector corresponding to blade-disk structure with dovetail connection (1/38 blade-disk) is studied and the finite element (FE) model of this structure is established based on ANSYS software. A revised normal rubbing force model is developed and a pulse force model is established to simulate the local rubbing phenomenon between the blade and elastic casing based on the revised model. The effects of the rubbing under different rotating speeds and penetration depths on the blade vibration response and contact behaviors of dovetail interface are analyzed. The results show that the rubbing will cause amplitude amplification phenomenon when the multiple frequency components are close to the first bending and first torsion natural frequencies. The arch bending of the blade caused by blade-tip rubbing can be identified by evaluating the displacement and stress of the blade in the radial direction ( y-direction). The dynamic stress in the process of rubbing gradually changes from alternation between tension and compression stress to the tension stress with the increasing rotating speed. Maximum contact sliding distance may change dramatically when the rubbing force is greater than the centrifugal force. With the increase of rotating speed, the contact pressure increases under the centrifugal force and its fluctuation under rubbing is smaller at higher rotating speeds.

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“…Using a lumped mass model of a single rub-impact rotor system, Tai et al 20 investigated the stability and steady-state response of the rotor system. Wu et al 21 built up the simplification model of the turbine rotor and computed the contact stress of turbine rotor. Padova et al 22 described experimental results obtained for an Inconel compressor blade rubbing a steel casing at engine speed.…”

Section: Introductionmentioning

confidence: 99%

Dynamic characteristics of mistuned bladed disk system under rub-impact force

Zhang

Zhao

Zhang

et al. 2014

Advances in Mechanical Engineering

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In order to study the rubbing of the mistuned bladed disk system with variable thickness blades, an elastically supported shaft-variable thickness blades coupled finite element model is established in this paper. A new rubbing force model is proposed considering the variable thickness section characteristics and rotation effect of the variable thickness blade. A method of mistuned parameter identification is introduced which consists of static frequency testing of blades, dichotomy, and finite element analysis. Based on the finite element method, the mistuned bladed disk system is made dynamic analysis in full rubbing by applying the judgment load method. The dynamic response of the mistuned bladed disk system is discussed under different conditions. The results show that increasing the amount of mistuning will increase the system vibration. At high speeds, the impact force will be partially offset by centrifugal force. And the rubbing gap affects the form of rubbing. With the gap decreases, the system will change from intermittent rubbing to continuous rubbing. In addition, when the system is rubbed, due to energy dissipation and blade damping, the stress is transferred from the blade tip to the blade root and attenuated. In general, rubbing is a random complex nonlinear vibration process.

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Effect of flank angle and friction coefficient on contact stress of turbine rotor

Cited by 3 publications

References 15 publications

Analysis of the valve positioner pilot valve hole plugging

Analysis of the valve positioner pilot valve hole plugging

Vibration response analysis of blade-disk dovetail structure under blade tip rubbing condition

Dynamic characteristics of mistuned bladed disk system under rub-impact force

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