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RISEquivalent Theodorsen Function for Fluidelastic Excitation in a Normal Triangular Array
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Fluidelastic instability (FEI) remains the most important mechanism of flow-induced vibrations, which can potentially cause large amplitude vibrations and early failure of nuclear steam generator tubes. In this study, ...
Numerical Analysis of Fretting Wear With a Hybrid Elastoplastic Friction Model
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Frettingwear is a common problem in different industries, especially when it comes to interactions between metallic components. Flowinduced excitation forces in heat exchangers for instance cause tubesupport interactions. ...
A Simple Empirical Model for Tube–Support Normal Impact Interaction
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Flowinduced vibration in a steam generator may cause tube–support interaction. This long term interaction is a challenging problem as it may lead to tube frettingwear and possibly tube failure. An estimation of the normal ...
Identification of Friction Model Parameters Using the Inverse Harmonic Method
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A hybrid friction model has been developed by Azizian and Mureithi (2013, “A Hybrid Friction Model for Dynamic Modeling of Stick–Slip Behavior,” ASME Paper No. PVP2013-97249) to simulate the general friction behavior between ...
Prediction of Streamwise Fluidelastic Instability of a Tube Array in Two-Phase Flow and Effect of Frequency Detuning
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Experimental measurements of the steady forces on a central cluster of tubes in a rotated triangular array (P/D=1.5) subjected to two-phase air–water cross-flow have been conducted. The tests were done for a series of void ...
Time Domain Simulation of the Vibration of a Steam Generator Tube Subjected to Fluidelastic Forces Induced by Two Phase Cross Flow
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Having previously verified the quasisteady model under twophase flow laboratory conditions, the present work investigates the feasibility of practical application of the model to a prototypical steam generator (SG) tube ...
Drag Coefficient and Two Phase Friction Multiplier on Tube Bundles Subjected to Two Phase Cross Flow
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An approximate analytical model, to predict the drag coefficient on a cylinder and the twophase Euler number for upward twophase crossflow through horizontal bundles, has been developed. To verify the model, two sets of ...
Investigation of Fluidelastic Instability of Fuel Rod Bundles Subjected to Combined Axial Flow and Jet Crossflow
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Flow-induced vibration is a major concern in the nuclear industry. The combined axial flow and jet crossflow has been found to induce fluidelastic instabilities (FEI) within the rod bundle, thus increasing the risk for ...
Effect of Tip Clearance on the Prediction of Nonsynchronous Vibrations in Axial Compressors
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This work investigates the effect of tip clearance size and operating temperature on the predictions of the critical rotor speed at which nonsynchronous vibrations (NSV) can be encountered in a turbine engine axial flow ...
Flow-Induced Vibrations of a Rotated Square Tube Array Subjected to Single-Phase Cross-Flow
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: This paper investigates the flow-induced vibration (FIV) and possibility of fluidelastic instability occurrence in a rotated square geometry tube array through a series of experimental tests. All experiments presented here ...