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Xuanyang Zhang, Miao Yu, Jiaxin Liang, Chao Yang and Wei Liu
For rectangular section tunnel construction, soil bin pressure fluctuates under biaxial emergence conditions. Support pressure is difficult to uniformly distribute, and it can easily cause instability of the tunneling face. The Silo-wedge model is used t...
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Francisco Alves Pereira, Fabio Di Felice and Francesco Salvatore
An experimental study is carried out in a cavitation tunnel on a propeller operating downstream of a non-uniform wake. The goal of this work is to establish quantitative correlations between the near pressure field and the cavitation pattern that takes p...
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Mohammad Zamani Nejad, Mehdi Jabbari, Mehdi Ghannad
Pág. 65 - 73
Using multi-layers method (MLM), a semi-analytical solution have been derived for determination of displacements and stresses in a thick cylindrical shell with variable thickness under non-uniform pressure. Three different profiles (convex, linear and co...
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Giulio Cantini, Simone Salvadori, Massimiliano Insinna, Giorgio Peroni, Gilles Simon, Duccio Griffini and Raffaele Squarcini
Regenerative pumps are characterized by a low specific speed that place them between rotary positive displacement pumps and purely radial centrifugal pumps. They are interesting for many industrial applications since, for a given flow rate and a specifie...
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Julian Kimmerl, Paul Mertes and Moustafa Abdel-Maksoud
Methods to predict underwater acoustics are gaining increased significance, as the propulsion industry is required to confirm noise spectrum limits, for instance in compliance with classification society rules. Propeller?ship interaction is a main contri...
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Zhaolong Ge, Jianyu Zhong, Jianguo Zhang, Yingwei Wang, Youchang Lvu and Sai Zhang
Slotting directional hydraulic fracturing is a new method for improving permeability of a coal seam in underground coal mines that can solve problems related to non-uniform permeability enhancement in the seam. A slotting nozzle is the key to this techno...
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Armanto P. Simanjuntak and Jae Young Lee
Printed circuit heat exchangers (PCHEs), which are used for thermal heat storage and power generation, are often subject to severe pressure and temperature differences between primary and secondary channels, which causes mechanical integrity problems. PC...
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Gaosheng Li, Hongguang Zhang, Fubin Yang, Songsong Song, Ying Chang, Fei Yu, Jingfu Wang and Baofeng Yao
A novel free piston expander-linear generator (FPE-LG) integrated unit was proposed to recover waste heat efficiently from vehicle engine. This integrated unit can be used in a small-scale Organic Rankine Cycle (ORC) system and can directly convert the t...
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Xuanye Liang, Lijun Yang, Gaofeng Wang and Jingxuan Li
The bifurcation process of self-sustained combustion instability pressure perturbations in a liquid rocket combustor is investigated based on the Helmholtz equations and a pressure dependent flame describing function. The modal frequency and growth rates...
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Noraiz Mushtaq, Gabriele Colella and Paolo Gaetani
Pressure gain combustion is a promising alternative to conventional gas turbine technologies and within this class the Rotating Detonation Engine has the greatest potential. The Fickett?Jacobs cycle can theoretically increase the efficiency by 15% for me...
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Dermot B. Casey, Gordon D. Airey, James R. Grenfell
Pág. 2402 - 2410
In pavement engineering a crude uniform contact pressure over a circular contact area is used to generate key strains for an analytical design method. The use of a more advanced tyre contact pressure measurement device has led to a situation where there ...
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Jang Hyun Lee and Juhairi Aris Bin Muhamad Shuhili
Pressure transient analysis for a vertically hydraulically fractured well is evaluated using two different equations, which cater for linear flow at the early stage and radial flow in the later stage. However, there are three different stages that take p...
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De-Chun Li, Tong-Tong Zhang, Zhen-Dong Cui, Jin-Ming Chen, Xiang-Qing Xu, Chong Xu, Zhao-Wei Zhang and Gang Song
With the rapid development of the subway rail transit, tunnels are buried at an increasing depth, raising the requirements of bearing capacity and waterproofness for linings. Functionally graded materials are introduced into the design of linings to save...
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Yunfeng Wu, Qingkuo Li, Hang Yuan, Ziliang Li, Shiji Zhou, Ge Han and Xingen Lu
High-pressure ratio centrifugal compressors? diffusers face challenges from high-velocity, non-uniform flow at the impeller outlet, decreasing efficiency and stall margin. To address this, this paper presents a novel vaned diffuser passage design method ...
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Huan-Feng Duan
This paper investigates the impacts of non-uniformities of pipe diameter (i.e., an inhomogeneous cross-sectional area along pipelines) on transient wave behavior and propagation in water supply pipelines. The multi-scale wave perturbation method is first...
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Huan-Feng Duan
Pág. 1 - 19
This paper investigates the impacts of non-uniformities of pipe diameter (i.e., an inhomogeneous cross-sectional area along pipelines) on transient wave behavior and propagation in water supply pipelines. The multi-scale wave perturbation method is first...
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Jaeshin Yi, Boram Koo and Chee Burm Shin
This paper reports a modeling methodology to predict the effects of operating conditions on the thermal behavior of a lithium-ion battery (LIB) module. The potential and current density distributions on the electrodes of an LIB cell are predicted as a fu...
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Kedong Zhang, Wenhua Wang, Yihua Liu, Linlin Wang, Yazhen Du, Hongxia Li and Yi Huang
A new type of anti-rolling device denoted as a fluid momentum wheel (FMW) is proposed to address the limitations of traditional gyrostabilizers in reducing the roll responses of floating platforms in waves. The proposed device is based on the same gyrosc...
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Yan Gao and Selda Oterkus
Nowadays, composite materials have been increasingly used in marine structures because of their high performance properties. During their service time, they may be exposed to extreme loading conditions such as underwater explosions. Temperature changes i...
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Anna A. Frolova,Vladimir A. Titarev
Pág. 116 - 120
Numerical solution of the Boltzmann equation for stationary high-speed flows around complex three-dimensional bodies is an extremely difficult computational problem. This is because of high dimension of the equation and lack of efficient implicit methods...
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