Results 271 to 280 of about 11,483,688 (354)

Propulsive performance of a two-dimensional elliptic foil undergoing interlinked pitching and heaving

The Physics of Fluids, 2022
We computationally study the propulsive performance of a two-dimensional elliptic foil undergoing interlinked pitching-heaving (IPH) motion. This motion is realized by pitching the foil about an axis on its centerline outside the foil and by varying the ...
Aayush Patel, Rajneesh Bhardwaj
semanticscholar   +1 more source

Scaling laws for drag-to-thrust transition and propulsive performance in pitching flexible plates

Journal of Fluid Mechanics, 2022
The propulsion of a pitching flexible plate in a uniform flow is investigated numerically. The effects of bending stiffness ($K$), pitching amplitude ($A_L$) and frequency ($St$) on the wake patterns, thrust generations and propulsive performances of the
Ze-Rui Peng, Y. Sun, Dan Yang, Yongliang Xiong, Lei Wang, Lin Wang   +5 more
semanticscholar   +1 more source

Scaling the self-propulsive performance of pitching and heaving flexible plates

Journal of Fluid Mechanics, 2022
Self-propulsive performances of the flexible plates undergoing pitching and heaving motions are investigated numerically. The effects of multiple key dimensionless parameters are considered, such as bending stiffness, heaving amplitude, pitching ...
Kui Liu, Xuechao Liu, Haibo Huang
semanticscholar   +1 more source

Route to transition in propulsive performance of oscillating foil.

Physical Review E, 2022
Transition in the propulsive performance and vortex synchronization of an oscillating foil in a combined heaving and pitching motion is numerically investigated at a range of reduced frequencies (0.16 ≤f^{*}≤ 0.64), phase offsets (0^{∘} ≤ϕ≤ 315^{∘}), and
S. Verma, A. Hemmati
semanticscholar   +1 more source

Implications of changing synchronization in propulsive performance of side-by-side pitching foils

Bioinspiration & Biomimetics, 2021
The unsteady hydrodynamics of side-by-side pitching foils are studied numerically at Reynolds number of 4000 with altering phase differences in the middle of an oscillation cycle. This represents a change in synchronization of oscillating foils, inspired
A. Gungor, A. Hemmati
semanticscholar   +1 more source

Propulsive performance of a newly conceptual design of flapping foil with fixed gurney plate- A numerical study

Ocean Engineering, 2021
In order to improve the propulsive performance of flapping foil, a new conceptual design of flapping foil device is proposed in current study by adding a pair of fixed gurney plates to the trailing end of flapping foil.
Yongcheng Li, N. Zhang, Z. Pan
semanticscholar   +1 more source

Performance of flapping foil propulsion

Journal of Fluids and Structures, 2005
The performance of an aquatic propulsion system inspired from the thunniform swimming mode is experimentally studied. This consists of generating the propulsive force with a foil undergoing a harmonic flapping which is a combination of a heave translation and a pitch rotation. Experiments are performed at a fixed value of the Reynolds number and of the
Schouveiler, Lionel, Hover, F. S., Triantafyllou, M. S.   +2 more
openaire   +2 more sources

MESSENGER Propulsion System Flight Performance

42nd AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2006
Study of the planet Mercury is fundamental to acquiring insight into the evolution of the inner solar system. NASA’s seventh Discovery mission, the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) mission, will orbit a spacecraft around Mercury for 1 Earth year to gather scientific data.
Samuel Wiley, Katie Dommer, Carl Engelbrecht, Robin Vaughan   +3 more
openaire   +1 more source

Phoenix Landing Propulsion System Performance

45th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2009
The highly successful Mars Phoenix Lander utilized a unique (to extraterrestrial body landings) pulsed thruster approach to powered landing. The design, test and flight performance of this system will be summarized. Phoenix inherited its propulsion system design from the ill-fated Mars Polar Lander, MPL and addressed potential shortcomings in that ...
John McAllister, Carey Parish
openaire   +1 more source

Hybrid Rocket Propulsion Performance Prediction

41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2005
The work performed in this effort used previously measured experimental subscale hybrid propellant data to develop a ground test motor in the 1000 pound-force range. This ground test motor was test fired and the test data was used to finalize a motor fuel grain geometry configuration and an oxidizer injector geometry. The ground tests were then used to
Robert Cavalleri, Richard Loehr
openaire   +1 more source