... wind energy that is being transferred to a galloping beam. The beam has a rigid tip body with a D-shaped cross section. Piezoelectric sheets are bonded on the top and bottom surface of the beam. During galloping, vibrational motion is input to the system due to aerodynamic forces on the D-section...

...Stefano Bianchi; Alessandro Corsini; Franco Rispoli; Anthony G. Sheard This study investigates the causal relationship between flow aerodynamics and radiated noise in low-speed axial fans. Using blades with three distinctive tip configurations, including two that were developed with a view...

... Aerodynamics for Micro Air Vehicle Applications , T. J. Mueller , ed., AIAA , Reston, VA , Vol. 195 , pp. 217 – 230 . Lee , J. -S. , Kim , J. -H. , and Kim , C. , 2008 , “ Numerical Study of the Unsteady-Force-Generation Mechanism of Insect Flapping Motion ,” AIAA J. 0001-1452...

... in a limit cycle at higher wind speeds. A linearized analytical model of the device is derived to include the effects of the three-way coupling between the structural, unsteady aerodynamic, and electrical aspects of the system. A stability analysis of this model is presented to determine the frequency...

... to its primary function of bearing aerodynamic loads, the wing/spar structure of an UAV or a MAV with embedded piezoceramics can provide an extra electrical energy source based on the concept of vibration energy harvesting to power small and wireless electronic components. Aeroelastic vibrations...

...Hongbiao Yu; K. W. Wang For bladed-disk assemblies in turbomachinery, the elements are often exposed to aerodynamic loadings, the so-called engine order excitations. It has been reported that such excitations could cause significant structural vibration. The vibration level could become even more...

..., the characteristics and phases of the mass flow rates through the suction valves are changed by modifying the clearance volume. aerodynamics pulsatile flow compressors valves linear differential equations pistons high-pressure effects gas pulsations suction manifold automotive compressor...

... aerodynamics Figure 1 shows a flexible symmetric rotor with a centered disk that illustrates the different type of linearized rotordynamic force coefficients that can act on the rotor bearing system from fluid pressure on the wheel (e.g., a seal or impeller). Point O is located on the bearing...

... computational time, limits of stability, and the strengths and weaknesses of the model reduction are investigated. elasticity aerodynamics supersonic flow vibrations finite difference methods Figure 3 is the time integrated, full-order solution of the panel deflection using 62 DOF...

... response functions of multiple co-rotating disks are measured in air and in vacuum to study the effects of aerodynamic coupling. In vacuum, vibration modes from each rotating disk are aerodynamically uncoupled; therefore, corresponding travelling waves from each disk have the same natural frequency. When...

... means for optimizing sensor and actuator geometries. Reduced-order models of potential-flow aerodynamics were developed for facilitation of analysis and design of the aeroelastic system in the early design phase. Using these methods, models capturing “95% of the physics with 8% of the modeling effort...

... aerodynamics In this paper, we first study clearance-induced transient nonlinear localization and beat phenomena in a system of coupled rods. We show that by changing the clearance of the backlash in the nonlinear spring and the stiffness characteristic, we can obtain either nonlinear localization...