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Numerical Simulation of Rotorcraft Icing: Accretion, Shedding, Tracking and Rotor Dynamics
The chapter presents a comprehensive 3-Dgeneric and portable computational toolset to assess the impact of ice accretion on helicopters in hover and...
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A Coupled Model of Angular-Contact Ball Bearing–Elastic Rotor System and Its Dynamic Characteristics Under Asymmetric Support
This paper provides the dynamic model of an angular-contact ball bearing–elastic rotor system to study its dynamic characteristics when an asymmetric...
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Three-dimensional flow investigation of a high-pressure turbine with rotor tip desensitization based on Winglet geometry
The tip clearance is the gap between the rotor blade row and its casing. In this region, a leakage flow on the rotor blade tip is induced by pressure...
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Influences of wind vortex intensity of rotor UAV on rice morphology and yield
During pesticide spraying operations, the downwash airflow generated by the rotor UAV disperses the rice canopies with different wind vortex...
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Instability attenuation and bifurcation studies of a non-ideal rotor involving time-delayed feedback
In non-ideal vibratory system, the excitation is a nonlinear function of system response. The dynamic behavior of such system is often characterized...
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Effects of Width Variation of Pressure-Side Winglet on Tip Flow Structure in a Transonic Rotor
Tip leakage flow has become one of the major triggers for rotating stall in tip region of high loading transonic compressor rotors. Comparing with...
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Robust tolerance design for rotor dynamics based on possibilistic concepts
Tolerance is one of major sources of uncertainty and it significantly contributes to the variation of dynamic responses of mechanical...
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Comparison of Tiltrotor Whirl Flutter Analyses with Gimballed and Hingeless Hub Models
This study investigates and compares the whirl flutter characteristics of two different hub models, gimballed and hingeless hubs, for the tiltrotor...
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Review of vortex methods for rotor aerodynamics and wake dynamics
Electric vertical take-off and landing (eVTOL) aircraft with multiple lifting rotors or prop-rotors have received significant attention in recent...
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Parametric Instability of an Electromechanically Coupled Rotor-Bearing System Subjected to Periodic Axial Loads: A Preliminary Theoretical Analysis
The parametric instability of an electromechanically coupled single-span rotor-bearing system subjected to periodic axial loads is studied. Here, the...
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Development of secondary vortex structures in rotor wakes
The blade tip vortex system is a crucial feature in the wake of helicopter rotors, and its correct prediction represents a major challenge in the...
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Instability Inception of a Single Rotor Embedded in a Transonic Stage with Partial Surge Inception
Partial surge is a type of instability inception discovered in our previous studies. It has been confirmed that partial surge is localized in the...
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Active Balancing Disk of Rotor-Bearing Systems Based on Vibration Amplitude Data: MATLAB-Aided Wireless Control
PurposeThe implementation of simple, feasible and inexpensive techniques to balance rotating systems is mandatory, particularly during operation....
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Design of a Helicopter System Recovery for a Sounding Rocket
In this article, the feasibility of spacecraft recovery using rotary wings is analysed. This technology possesses the ability to perform a safe and...
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Stator modification methods for diagonal flow fans to achieve noise reduction of rotor-stator interaction
The effect of three noise reduction methods for rotor-stator interaction in diagonal flow fans was studied. The unsteady flow field and directivity...
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Vibration Response Prediction in Rotor Systems with External Dam** by Deep Learning Using Geometrical Features
This paper attempts to predict the response of a rotor-bearing system with external dam** by training a neural network model using the frequency...
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Nonlinear modal analysis and its application on prediction of resonance speed for a rotor–stator rubbing system
In this article, the nonlinear dynamic characteristics of a rotor–stator rubbing system, which simultaneously considers the dynamical characteristics...
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Aerodynamic shape optimization of wind turbine rotor blades using the continuous adjoint method
This paper presents the development of the continuous adjoint method for incompressible fluid flows, solved for the absolute velocity in the relative...
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Investigation of flow characteristics in a rotor-stator cavity under crossflow using wall-modelled large-eddy simulation
Rotor-stator cavities are frequently encountered in engineering applications such as gas turbine engines. They are usually subject to an external hot...
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Numerical Simulation of Rotorcraft Icing: Accretion, Shedding, Tracking and Rotor Dynamics
The chapter presents a comprehensive 3-Dgeneric and portable computational toolset to assess the impact of ice accretion on helicopters in hover and...