Results 51 to 60 of about 10,078,606 (221)

Numerical investigation on turbulent flame jet characteristics of ultra-lean H2/air ignited by pre-chamber enrichment strategy

Energy Conversion and Management: X
Pre-chamber enrichment for igniting ultra-lean premixed H2/air is an effective strategy for achieving ultra-low emission and improved fuel economy. This study employed a three-dimensional numerical simulation based on a constant volume combustion chamber
Wenchao Zhu, Xuanrui Zhang, Mingkun Zhang, Shuo Yin, Xianrong Wu, Wuqiang Long, Xiangyu Meng   +6 more
doaj   +1 more source

Microfabrication of Soft Millirobots Propelled by Low Voltage Electrohydraulic Actuators

Advanced Materials Technologies, EarlyView.
Manual layer‐by‐layer assembly is replaced by wafer‐level MEMS batch fabrication for compliant polymer‐based electrohydraulic actuators. The microfabricated devices integrate sacrificially defined microcavities, Parylene‐C‐sealed inlets, and multilayer polymer–metal films.
Shai Shmulevich, Florian Hartmann, Herbert Shea   +2 more
wiley   +1 more source

Parametric Investigation of Methanol Spray Combustion Under Direct-Injection Conditions

Fluids
This study presents a systematic mapping of methanol spray autoignition, lift-off, and flame development across an engine-relevant range of ambient temperatures (1000–1200 K), injection pressures (70–130 MPa), and O2 concentrations (21–15 vol.%), using a
Kirtan Aryal, Guanxiong Zhai, Ruiyuan Cao, Yijun Lin, Shijie Xu, Kar Mun Pang, Cheng Wang, Guan Heng Yeoh, Qing Nian Chan   +8 more
doaj   +1 more source

Visualization of Gas-to-Liquid (GTL) Fuel Liquid Length and Soot Formation in the Constant Volume Combustion Chamber

Journal of Thermal Science and Technology, 2008
In this research, GTL spray combustion was visualized in an optically accessible quiescent constant-volume combustion chamber. The results were compared with the spray combustion of diesel fuel. Fast-speed photography with direct laser sheet illumination
Ulugbek AZIMOV, Ki-Seong KIM
doaj   +1 more source

Free Stream Behavior of Hydrogen Released from a Fluidic Oscillating Nozzle

Fluids, 2021
The H2 internal combustion engine (ICE) is a key technology for complete decarbonization of the transport sector. To match or exceed the power density of conventional combustion engines, H2 direct injection (DI) is essential.
Anja Fink, Oliver Nett, Simon Schmidt, Oliver Krüger, Thomas Ebert, Alexander Trottner, Bojan Jander   +6 more
doaj   +1 more source

TiO6 as a Compensatory Structural Unit in Co‐Free, High‐Ni Layered Oxide for Durable Lithium‐Ion Batteries

Advanced Science, EarlyView.
Ti substitution stabilizes Co‐free high‐Ni layered oxides through both structural and electronic effects. TiO6 octahedra act as compensatory structural units that help interrupt cooperative Jahn–Teller distortion and suppress detrimental phase transitions, while the electron‐withdrawing inductive effect of Ti stabilizes the oxygen lattice. As a result,
Bixian Ying, Zhenjie Teng, Jun Wang, Honghong Tian, Charlotte von Petersdorff‐Campen, Rommel T. Tolla, Iuliia Mikulska, Linus Voigt, Sascha Nowak, Verena Naber, Alexander Schökel, Yuanming Liu, Michael Merz, Peter Nagel, Stefan Schuppler, Katja Frenzel, Adrian Jonas, Lena Mathies, Martin Winter, Karin Kleiner   +19 more
wiley   +1 more source

Low-temperature combustion analysis of butanol isomer/diesel blends under reduced oxygen conditions in a constant volume combustion chamber

Case Studies in Thermal Engineering
Butanol is an attractive biofuel and power resource in the field of power generation, long-haul heavy-duty transportation, and off-road applications.
Jinlin Han, L.M.T. Somers
doaj   +1 more source

Flash Boiling Combustion Performance of Ethanol Fuel in Controlled Reaction Environment [PDF]

E3S Web of Conferences
The utilization of alternative fuels such as alcohols and ethers has received substantial attention for the purpose of carbon neutralization and replacing traditional fossil fuels.
Liu Gaoling, Cui Mingli, Luo Xulin, Wang Guodong, Yao Bowei, Li Xuesong   +5 more
doaj   +1 more source

Flame Suppression in Lithium‐Ion Batteries During Thermal Runaway Through Solvent Design Considering the Volatility–Flammability Relationship

Advanced Science, EarlyView.
An asymmetric sulfonate solvent forms thermally stable interphases and demonstrates non‐flammability, suppressing heat accumulation for safer, high‐performance lithium‐ion batteries. ABSTRACT An asymmetric sulfonate‐based linear solvent, 2,2,2‐trifluoromethyl mesylate (FMS), is designed and used as the primary solvent in liquid electrolytes to enhance ...
Chi‐Yeong Hong, Joon Ha Chang, Ho Yeon Jang, Jooeun Byun, Chae Rim Lee, Jeongmin Kim, Oh B. Chae, Youngjin Kim, Jun Ho Song, Chihyun Hwang, Seoin Back, Ki Jae Kim, Hyun‐seung Kim   +12 more
wiley   +1 more source

Supercapacitor Safety: Overcharge‐Induced Failure Mechanisms in Electrochemical Double‐Layer Capacitors

Advanced Science, EarlyView.
Time‐resolved synchrotron radiography reveals the internal evolution of electrochemical double‐layer capacitors under abusive overcharge. EDLCs are shown to follow a thermally driven failure pathway involving electrolyte decomposition, gas generation, and structural collapse, distinct from chemically driven thermal runaway effects of Lithium‐ion ...
Thomas Dore, Inez Kesuma, Abdus S. Ali, Jonas Pfaff, Yuxiao Jin, Rosalie Hamill, Mark Buckwell, Hamish Reid, Thomas Finco, Zeyu Sun, Yuanze Li, Sebastian Schopferer, Siegfried Nau, Nils Böttcher, Henning Markötter, Alexander J. E. Rettie, James Robinson, Paul R. Shearing, Alexander Rack, Thomas S. Miller   +19 more
wiley   +1 more source