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Nora Schjøth Bunkholt, Toivo Säwén, Martina Stockhaus, Tore Kvande, Lars Gullbrekken, Paula Wahlgren and Jardar Lohne
Pitched wooden roofs are ventilated through an air cavity beneath the roofing in order to remove heat and moisture from the roof construction. The ventilation is driven by wind pressure and thermal buoyancy. This paper studies ventilation driven by therm...
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Sara Bredal Ingebretsen, Erlend Andenæs and Tore Kvande
Accurate values for the climatic conditions in an air cavity, hereby called the microclimate, are crucial when calculating and simulating the performance of a ventilated roof and façade system. The climatic stress of its components and their mould and ro...
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Yijiao Guo, Luchen Zhang, Lei Yu, Shaoze Luo, Chuang Liu and Yuan Liu
To account for changes in the performance of spillway aerator structures of high-altitude dams, depressurization generalized model experiments and theoretical analyses were conducted in this study. Measurements were taken for ventilation hole air velocit...
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Jinshun Hu, Yongshui Lin, Zhiwei Zhou, Xiaofei Cao, Qingjia Chi and Weiguo Wu
To further improve the low-frequency broadband sound absorption capability of the underwater anechoic layer (UAL) on the surface of marine equipment, a novel sound absorption structure with cavities (NSSC) is designed by adding resonators and honeycombs ...
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Filippo Cucinotta, Dario Mancini, Felice Sfravara and Francesco Tamburrino
The use of ventilated hulls is rapidly expanding. However, experimental and numerical analyses are still very limited, particularly for high-speed vessels and for stepped planing hulls. In this work, the authors present a comparison between towing tank t...
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Douaissia Omar Hadj Aissa,Oleksii Lysytsia,Taras Mykhailenko,Ilya Petukhov
Pág. 12 - 20
The choice of the structure of the mathematical model of thermal-hydraulic processes in the oil cavities of the GTE rotor supports has been substantiated. A three-dimensional CFD model has been built to calculate multiphase currents involving information...
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Dongmei Yang, Zhiyuan Sun, Yi Jiang and Zeyang Gao
Based on the FVM (finite volume method) numerical method, the flow field around the stepped planing hull in Taunton series was simulated. According to the general procedure of numerical uncertainty analysis, the numerical uncertainty in the high-speed fl...
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Andrea Niampira Daza,Joan Lluís Zamora
Pág. 247 - 257
The use of double-sheet enclosures with an intermediate air chamber in façades guarantees a higher quality of acoustic insulation against external airborne noise. The effective advantages of the intermediate air chamber depend mainly on its airtightness ...
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Ángeles Mas, Jose Vercher, Francisco Cubel, Enrique Gil, Carlos Lerma
Pág. 137 - 148
The optimization of connections arrangement to guarantee the anchored veneers with continuous air cavity stability is necessary, for better performance and durability of the façade. In this paper, different arrangements for the anchors to structure and d...
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Riccardo Panciroli, Tiziano Pagliaroli and Giangiacomo Minak
Elastic bodies entering water might experience fluid–structure interaction phenomena introduced by the mutual interaction between structural deformation and fluid motion. Cavity formation, often misleadingly named cavitation, is one of these. This ...
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Riccardo Panciroli, Tiziano Pagliaroli and Giangiacomo Minak
Elastic bodies entering water might experience fluid–structure interaction phenomena introduced by the mutual interaction between structural deformation and fluid motion. Cavity formation, often misleadingly named cavitation, is one of these. This ...
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Riccardo Panciroli, Tiziano Pagliaroli and Giangiacomo Minak
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Jin-Kyu Yang, Chae-Young Kim and Minji Lee
We propose a new type of refractive index sensing based on the transverse magnetic (TM) modes in the photonic crystal (PhC) nanobeam (NB) cavity with a horizontal air gap. The electric field of the resonant TM mode is strongly confined within the horizon...
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Sara Bredal Ingebretsen, Erlend Andenæs, Lars Gullbrekken and Tore Kvande
Harsh climatic conditions in the Nordic countries are being worsened by climate change, which increases the moisture load on building façades. New types of defects are being observed in air cavities in well-designed and well-built wooden façades and roof...
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Jian He, Xiang Luo, Yang Bai, An Song and Tao Yang
In aero-engines, a secondary air system is used to cool the rotor discs and seal cavities between rotor and stator parts. The pressure loss caused by bleed air can be effectively reduced by setting the finned vortex reducer. Thus, the bleed system design...
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Guojun Yu, Lizhi Zhang, Sheng Jia, Yanting Geng and Jie Liu
Natural convections subjected to multi-Degree of Freedom (DoF) motion are much more complex than those in static case, and those subjected to yawing motion are the simplest and ideal case for investigating their characteristics due to less interactive pa...
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Zhonghao He, Hongbo Wang, Fan Li, Yifu Tian, Minggang Wan and Jiajian Zhu
The ethylene-fueled flameholding characteristics of a cavity-based scramjet combustor are experimentally and numerically investigated. The test facility used the air heater, which heats air from room temperature to total temperature 1477 K. A nozzle is i...
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Qingcai Zhang, Qinqin Wang, Xiaoming Tan and Jingzhou Zhang
A rim seal is often used to prevent the ingress of high-temperature gas into the turbine disk cavity and protect the turbine disk from damage. Based on the overlapping rim seal (Seal-A), this paper proposes two more composite sealing structures (Seal-B a...
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Rubing Liu, Shenghui Xue, Wentao Wei, Qi Lin and Kun Tang
Conventional plasma synthetic jet actuators rely only on jet orifice for suction when functioning for long durations. A limited supplementary gas leads to jet velocity reduction and weakening of the flow control ability. Therefore, this study proposes an...
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Aiman Albatayneh, Dariusz Alterman, Adrian Page and Behdad Moghtaderi
To design energy-efficient buildings, energy assessment programs need to be developed for determining the inside air temperature, so that thermal comfort of the occupant can be sustained. The internal temperatures could be calculated through computationa...
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