Results 31 to 40 of about 4,373 (227)

Skyport airframe: design and manufacturing [PDF]

, 2015
Many rural areas of developing countries lack the necessary transportation infrastructure to have reliable access to basic needs. This is particularly true for medical supplies.
Clark, Thomas, Dewane, Michael, Faleta, Siosiua, Llanos-Hinson, Robert   +3 more
core   +1 more source

Design, Modeling, and Experimentation of Polar Robot: Assisted Sail and Multimode Motion for Energy Saving

Advanced Intelligent Systems, Volume 7, Issue 12, December 2025.
This article proposes a polar robot that utilizes assisted sail and multimode motion to achieve energy‐saving. The design, modeling, and experimental methods are introduced. The results show that the energy‐saving effect of the robot using a multimode energy savings control strategy reaches 21.19%, providing technical support for long‐term polar ...
Yongsheng Luo, Zhaokun Guo, Tao Liu, Kaixuan Li, Jinnong Liao, Lefan Guo, Yanhe Zhu, Gangfeng Liu, Jie Zhao   +8 more
wiley   +1 more source

Rotational accelerations stabilize leading edge vortices on revolving fly wings [PDF]

, 2009
The aerodynamic performance of hovering insects is largely explained by the presence of a stably attached leading edge vortex (LEV) on top of their wings. Although LEVs have been visualized on real, physically modeled, and simulated insects, the physical
Dickinson, Michael H., Lentink, David
core   +2 more sources

The crucial role of meshing in computational fluid dynamics simulations for organic geometries in paleobiology: Describing fluid dynamics performance through best practices

Methods in Ecology and Evolution, Volume 16, Issue 10, Page 2170-2194, October 2025.
Abstract Computational fluid dynamics (CFD) has become an essential tool for studying fluid interactions in biological systems. While widely used in engineering, its application in the natural sciences, particularly in paleobiology, remains limited due to the challenges of meshing complex organic geometries.
Matheo López‐Pachón, Jordi Marcé‐Nogué   +1 more
wiley   +1 more source

Performance optimization of a printed circuit heat exchanger for the recuperated gas turbine

Case Studies in Thermal Engineering
To further improve the thermal efficiency of gas turbines, the recuperator needs to be employed and the printed circuit heat exchanger with airfoil fins meets the recuperator's requirements of high heat transfer capacity, low flow resistance, and high ...
Keyong Cheng, Xiaokai Liu, Junlin Chen, Xunfeng Li, Xiulan Huai   +4 more
doaj   +1 more source

Innovative Dual Rotor Wind Turbine Design Based on Humpback Whale Blades: Simulation Analysis

Energy Science &Engineering, Volume 13, Issue 8, Page 3998-4010, August 2025.
To enhance the performance of wind turbines, this study investigates the integration of two wind energy harvesting systems. An optimal wind turbine configuration has been identified by using dual rotor wind turbine technology with a novel blade design known as the humpback blade, which is inspired by the fins of humpback whales. ABSTRACT To enhance the
Mais Alzgool, Mohammad Hassan, Raed Alzoubi   +2 more
wiley   +1 more source

Research on swimming hydrodynamics based on a three‐dimensional high‐precision fish model

River, Volume 4, Issue 3, Page 341-350, August 2025.
Abstract Fish swimming hydrodynamics serves as a critical foundation for aquatic ecological conservation, with recent research extending from 2D to 3D perspectives. This study employs 3D high‐fidelity modeling with dynamic mesh technology to investigate how cylindrical obstacles at varying positions affect Carassius auratus locomotion. Analysis of nine
Lin Sun, Ruidong An, Jia Li, Wei Jiang, Diji Zhang   +4 more
wiley   +1 more source

Study on Supercritical CO2 Heat Transfer Enhancement in Airfoil PCHE

Liaoning Shiyou Huagong Daxue xuebao
In order to break through the bottleneck of heat transfer efficiency of traditional printed circuit heat exchangers, a physical model of airfoil PCHE was established, numerical simulations were conducted to study the convective heat transfer of ...
Xiaojun LIAN, Li ZHANG, Fei WANG, Gang LI, Yue GAO, Wenquan JIANG   +5 more
doaj   +1 more source

Boundary layer control for airships [PDF]

, 1975
An investigation is summarized of the aerodynamic principle of boundary layer control for nonrigid LTA craft. The project included a wind tunnel test on a BLC body of revolution at zero angle of attack.
Pake, F. A., Pipitone, S. J.
core   +1 more source

Efficient cruising for swimming and flying animals is dictated by fluid drag

, 2018
Many swimming and flying animals are observed to cruise in a narrow range of Strouhal numbers, where the Strouhal number ${St = 2fA/U}$ is a dimensionless parameter that relates stroke frequency $f$, amplitude $A$, and forward speed $U$. Dolphins, sharks,
Floryan, Daniel, Smits, Alexander J., Van Buren, Tyler   +2 more
core   +1 more source