cecere, donato cimini, matteo carpenella, simone caldarelli, jan giacomazzi, eugenio
This study explores the combined effects of fuel composition and injection angle on the combustion behavior of an NH3/H2/N2 jet in an air crossflow by means of high-fidelity Large Eddy Simulations (LESs). Four distinct fuel mixtures derived from ammonia partial decomposition, with hydrogen concentrations ranging from 15% to 60% by volume, are injec...
wang, jingxue patruno, luca chen, zhongcan yang, qingshan tamura, yukio
Shelterbelts provide essential protection against wind erosion and soil degradation, as well as protection for fruit-bearing plants and crops from strong winds. Enhancing their sheltering capabilities requires optimizing their pattern and orientation, as well as defining their height and desired canopy shape, according to the desired performance. I...
Javadi, Ardalan Alexeev, Alexander
Published in
Fluid Dynamics Research
Thin liquid film flowing down the inner concave surface of a vertical cylindrical vessel is examined. At the top of the vessel, the water is injected horizontally at high speed circumferentially along the vessel wall and flows downwards due to the action of gravity. This turbulent film flow is modeled using the large eddy simulation (LES) and Reyno...
montillo, renato morani, maria cristina fecarotta, oreste carravetta, armando
Recent research has focused on the dynamic control and regulation of hydraulic devices like pumps and turbines to enhance the efficiency of water systems. These devices are adjusted to maintain nearly optimal hydraulic conditions and operating efficiency, although achieving both can be challenging due to factors like machine type and changes in dis...
caban, lena tyliszczak, artur
In this paper, we analyze the auto-ignition process of hydrogen in a hot oxidizer stream composed of oxygen–nitrogen and oxygen–water vapor with nitrogen/water vapor mass fractions in a range of 0.1–0.9. The temperature of the oxidizer varies from 1100 K to 1500 K and the temperature of hydrogen is assumed to be 300 K. The research is performed in ...
Vanbersel, Benjamin
La demande d’énergie ne cesse d’augmenter et est en grande partie obtenue grâce à la combustion, avec des carburants d’origine fossile ou renouvelable. Ces carburants, souvent stockés dans des environnements clos, présentent un danger en cas de fuite. En effet, l'inflammation d'un nuage de gaz pré-mélangé peut entraîner une explosion, provoquant un...
zhang, shuo zhong, dongdong wang, hao xingshuang, wu ning, ge
To achieve high-fidelity large eddy simulation (LES) predictions of complex flows while keeping computational costs manageable, this study integrates a high-order WENO-ZQ scheme into the LES framework. The WENO-ZQ scheme has been extensively studied for its accuracy, robustness, and computational cost in inviscid flow applications. This study exten...
Strempfl, Patrick
To increase the efficiency of thermal engines, new pressure-gain combustion systems are the subject of extensive studies over the last years. Rotating Detonation Engines (RDE) constitute an example of such systems, where a self-sustained detonation continuously consumes fuel in a typically annular combustion chamber. Experimental investigation of t...
guan, dawei chu, yinuo chen, cheng liu, jingang yao, zishun
In recent years, jacket foundations have been increasingly employed in offshore wind farms. Their complex design comprising piles and trusses poses challenges for conducting comprehensive flow field measurements using physical experiments. Consequently, the influence of the flow field on local scour around these foundations remains unclear. Therefo...
Moldovan, Gabriel-Ionut Mariotti, Alessandro Cordier, Laurent Lehnasch, Guillaume Salvetti, Maria-Vittoria Meldi, Marcello
The potential of sequential Data Assimilation (DA) techniques to improve the numerical accuracy of Large Eddy Simulation (LES) performed on coarse grid is assessed. Specifically, this paper evaluates the performance of the Multigrid Ensemble Kalman Filter (MGEnKF) method, recently introduced by Moldovan, Lehnasch, Cordier and Meldi (Journal of Comp...
