Results 151 to 160 of about 5,070,033 (225)

An enhanced galloping-based piezoelectric energy harvester with non-rotational bluff body

Applied Physics Letters, 2022
This study proposes a bluff body non-rotational galloping-based piezoelectric wind energy harvester (BNRGH) for overall output performance enhancement. The bluff body used in this structure is designed to be available to rotate with respect to the free ...
Wan Sun, Yue Zhang, G. Cheng, Shangwen He, Zhaorui Yang, Jianning Ding   +5 more
semanticscholar   +1 more source

Numerical comparison of premixed H2/air combustion characteristic of three types of micro cavity-combustors with guide vanes, bluff body, guide vanes and bluff body respectively

International journal of hydrogen energy, 2021
Micro-scale combustion is facing the problems of ignition difficulty, combustion instability, and low combustion efficiency. Therefore, it is necessary to improve the combustion characteristics in micro-combustor to expand the application range of micro ...
Wei Gao, Yunfei Yan, Lujing Huang, Kaiming Shen, Ziqiang He, Bo Gao   +5 more
semanticscholar   +1 more source

Adaptive wind energy harvester with transformable bluff body

Energy Conversion and Management, 2021
A novel adaptive wind energy harvester with a transformable bluff body responsive to external wind velocity is proposed in this study. This study is inspired by our finding that when an external wind velocity is lower than a specific (threshold) wind ...
Se-Jong Jeon, Wan Sun, H. Jang, J. Seok
semanticscholar   +1 more source

Subcritical Flow Around Bluff Bodies

AIAA Journal, 2002
Results of experimental investigations of vortex-shedding frequencies and surface pressures of circular and square cylinders with the same hydraulic diameter are described. Pressure measurements on circular and square cylindersandhot-e lm measurementsinthewakeswereconducted.
M. Sarioglu, T. Yavuz
openaire   +1 more source

Enhancement of low-speed piezoelectric wind energy harvesting by bluff body shapes: Spindle-like and butterfly-like cross-sections

Aerospace Science and Technology, 2020
Fluid-structure interaction can be utilized to harvest the low-speed wind energy for sustaining the low-power sensors for structural health monitoring.
Junlei Wang, Chengyun Zhang, Shanghao Gu, Kai Yang, Hang Li, Yuyang Lai, D. Yurchenko   +6 more
semanticscholar   +1 more source

Characteristics of NH3/H2/air flames in a combustor fired by a swirl and bluff-body stabilized burner

, 2020
Combustion of ammonia (NH3) presents a number of challenges due to its low reactivity, poor flame stability, very low flame speed and high NOx emissions in a range of burning conditions.
Miguel C. Franco, Rodolfo C. Rocha, Mário Costa, M. Yehia   +3 more
semanticscholar   +1 more source

Benchmarking Bluff Body Aerodynamics

21st AIAA Aerodynamic Decelerator Systems Technology Conference and Seminar, 2011
Flow around aerodynamic decelerators systems can be canonically represented by unsteady bluff body aerodynamics where the incident flow quickly detaches from contact with the body and a complex system of temporally evolving vortical structures establishes itself in the wake of the body. By focusing consideration on the flow around simplified bluff body
Greg Noetscher, Richard Charles
openaire   +1 more source

Magnet-induced monostable nonlinearity for improving the VIV-galloping-coupled wind energy harvesting using combined cross-sectioned bluff body

Smart materials and structures (Print), 2020
This study proposes a novel wind energy harvester that exploits both vortex-induced vibration (VIV) and galloping phenomena with a hybrid cross-sectioned bluff body.
Kai Yang, Tian Qiu, Junlei Wang, Lihua Tang   +3 more
semanticscholar   +1 more source

A novel self-tuning wind energy harvester with a slidable bluff body using vortex-induced vibration

, 2020
In this study, we propose a novel self-tuning vortex-induced vibration (VIV)-based piezoelectric energy harvesting system with a slidable bluff body configured in a circular cylinder to improve the output energetic performance.
Wan Sun, J. Seok
semanticscholar   +1 more source

Bluff body aerodynamics in pulsating flow

Journal of Wind Engineering and Industrial Aerodynamics, 1988
Abstract The effect of pulsating flow superposed upon a mean flow on the side surface pressure fluctuations of two-dimensional (2-D) rectangular cylinders with slenderness ratios (width/height ratio, B/D) ranging from 0.5 to 20 has been studied. The purpose of this study was to understand the mechanism of interaction between external flow pulsations ...
M. Matsumoto, N. Shiraishi, H. Shirato
openaire   +1 more source