Experimental investigation of low aspect ratio, large amplitude, aeroelastic energy harvesting systems

2017 ◽  
Author(s):  
Benjamin Kirschmeier ◽  
Jacob Summerour ◽  
Matthew Bryant
Keyword(s):  
Experimental Investigation ◽  
Energy Harvesting ◽  
Aspect Ratio ◽  
Large Amplitude ◽  
Low Aspect Ratio ◽  
Harvesting Systems

Experimental investigation on tilt stabilizing effect of external toroidal field in low aspect ratio tokamak

1997 ◽  
Vol 4 (2) ◽  
pp. 315-322 ◽  
Author(s):  
A. Morita ◽  
Y. Ono ◽  
M. Katsurai ◽  
M. Yamada ◽  
S. Yoshikawa
Keyword(s):  
Experimental Investigation ◽  
Aspect Ratio ◽  
Toroidal Field ◽  
Low Aspect Ratio ◽  
Stabilizing Effect

Efficiency evaluation of energy harvesting from discrete gust response for plate wing

2020 ◽  
pp. 095440622096812
Author(s):  
Yun Cheng ◽  
Daochun Li ◽  
Jinwu Xiang
Keyword(s):  
Energy Harvesting ◽  
Aspect Ratio ◽  
Electrical Energy ◽  
Evaluation Methods ◽  
Energy Output ◽  
Efficiency Evaluation ◽  
Plate Model ◽  
Low Aspect Ratio ◽  
Wing Model ◽  
Gust Response

Gust response of aircraft can become a potential energy source thanks to energy harvesting (EH) methods, one of which can transform mechanical energy to electrical energy, applying piezoelectric ceramic transducers (PZTs). Harvested electrical energy needs to be evaluated for reuse, but current beam-model-based evaluation methods of EH performance for a plate model are insufficient because the plate is two-dimensional. This paper proposes two types of EH evaluation methods to analyze the gust exciting low-aspect-ratio plate wing model. One method focuses on the ratio of electrical energy to kinetic energy, and the other reflects energy output density per unit weight. These two methods can reveal the higher energy harvesting efficiency positions when utilizing PZTs on the flight EH system. Plate model, three-dimensional doublet lattice unsteady aeroelastic method and piezoelectric equation are used to build piezoaeroelastic wing model, and 1-cosine discrete gust load is the base excitation. A time-domain aero-electro-elastic state-space equation of the low-aspect-ratio piezoaeroelastic plate wing model is established, and the time-history analysis is used to solve the EH output. Results show that EH outputs are influenced by various parameters including load resistance, PZT thickness, gust intensity and wavelength, and PZT location variation. The optimal values of the proposed EH efficiency evaluation methods are found and explained.

Performance of Low-Aspect-Ratio Diffusers With Fully Developed Turbulent Inlet Flows: Part I—Some Experimental Results

1973 ◽  
Vol 95 (3) ◽  
pp. 385-392 ◽  
Author(s):  
O. J. McMillan ◽  
J. P. Johnston
Keyword(s):  
Experimental Investigation ◽  
Aspect Ratio ◽  
Boundary Layers ◽  
High Aspect Ratio ◽  
Total Pressure ◽  
Turbulent Boundary Layers ◽  
Two Dimensional ◽  
Low Aspect Ratio ◽  
Performance Curves ◽  
Existing Data

An experimental investigation of the effects of incompressible, fully developed, turbulent inlet flow on the performance of straight, two-dimensional rectangular diffusers of low aspect ratio is presented. Results presented include flow regime information, performance curves, and total-pressure loss data for a series of diffusers of moderate non dimensional length and low aspect ratio. The results are compared to existing data and correlations and important differences are noted between the diffusers of this study and diffusers of high aspect ratio with thin to moderately thick turbulent boundary layers at inlet.

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