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Chunyang Wang, Zhou Zhou and Rui Wang
The new vertical take-off and landing UAV meets the requirements of vertical take-off and landing and can cruise at high speed, which lays a good foundation for future military and civil fields.
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Yanjun Chen, Shengye Wang and Wei Liu
Over the past years, there has been innovative ideas about data-driven turbulence modeling proposed by scholars all over the world. This paper is a continuity of these significant efforts, with the aim of offering a better representation for turbulence p...
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Carlo Giorgio Grlj, Nastia Degiuli, Andrea Farkas and Ivana Martic
The present study aims to investigate the scale effects of the open water propeller performance using computational fluid dynamics (CFD). The results are presented for the propeller which was previously 3D scanned and digitized. The results obtained usin...
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Muye Ge, Urban Svennberg and Rickard E. Bensow
Sheet cavitation inception can be influenced by laminar boundary layer flow separation under Reynolds numbers regimes with transitional flow. The lack of accurate prediction of laminar separation may lead to massive over-prediction of sheet cavitation un...
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Haifeng Jiao, Jilian Shan, Guorui Yang, Mengcheng Wang and Songshan Chen
In this study, a comparative analysis of the shutdown transitions of a full-flow pump and an axial-flow pump was carried out through numerical simulation and model tests. The UDF method was used to achieve control of the impeller rotational speed during ...
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Xinxin Zhao, Faling Yin, Haiyuan Yao, Yaqiang Qi and Xin Cao
Mass transfer and phase transition have an important effect on the velocity of bubble migration in deepwater wellbores, and accurate prediction of bubble migration velocity is crucial for calculating the safe shut-in period of deepwater oil and gas wells...
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Erwhin Irmawan, Agus Harjoko and Andi Dharmawan
The research topic of VTOL (vertical take-off and landing) fixed wing (VFW) is gaining significant attention, particularly in the transition phase from VTOL to fixed wing and vice versa. One of the latest and most challenging transition strategies is the...
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Jian Guo, Binbin Pan, Weicheng Cui and Shengbing Hu
A constitutive relation for shape memory alloys (SMAs) that is simple, accurate, and effective is the basis for deep-sea intelligent actuators used in marine engineering applications. The existing kinetic models of phase transition all have common drawba...
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Irina Rudskaya, Darya Kryzhko, Angi Shvediani and Magdalena Missler-Behr
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Paul Agu Igwe, David Gamariel Rugara and Mahfuzur Rahman
The economic advancement of emerging markets such as China, Brazil, and India has been regarded as one of the benefits of a globalized world. This paper revisits and evaluates the Uppsala model to teases out the process, speed, determinants, and challeng...
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Andrea Savio, Luigi De Giovanni and Mariangela Guidolin
This paper proposes the application of a multivariate diffusion model, based on ordinary differential equations, to investigate the energy transition in Germany. Specifically, the model is able to analyze the dynamic interdependencies between coal, gas a...
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Langfu Cui, Chaoqi Zhang, Qingzhen Zhang, Junle Wang, Yixuan Wang, Yan Shi, Cong Lin and Yang Jin
There are some problems such as uncertain thresholds, high dimension of monitoring parameters and unclear parameter relationships in the anomaly detection of aero-engine gas path. These problems make it difficult for the high accuracy of anomaly detectio...
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Najmeh Mozaffaree Pour and Tõnu Oja
From 1990 to 2018, built-up areas in Tallinn, Estonia?s capital city, increased by 25.03%, while its population decreased by -10.19%. Investigating the factors affecting urban expansion and modeling it are critical steps to detect future expansion trends...
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Ettore Bertolini, Paul Pieringer and Wolfgang Sanz
The aim of this work is to study the influence of different subgrid-scale (SGS) closure models and inflow turbulence conditions on the boundary layer transition on the suction side of a highly loaded transonic turbine cascade in the presence of high free...
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Slawomir Kubacki, Daniele Simoni, Davide Lengani and Erik Dick
An algebraic intermittency model for boundary layer flow transition from laminar to turbulent state, is extended using an experimental data base on boundary layer flows with various transition types and results by large eddy simulation of transition in a...
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Da-Qing Li, Per Lindell and Sofia Werner
Unexpected low value of the relative rotative efficiency ?R is sometimes noted when scaling the towing tank model-test result with the ITTC-78 method to obtain the propulsive efficiency factors of propellers. The paper explains the causes of this phenome...
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Thanh Hoai Nguyen and Kyoungsik Chang
In the present work, a comparative study of two major non-intrusive polynomial chaos methods, Point-Collocation Non-Intrusive Polynomial Chaos (NIPC) and Non-Intrusive Spectral Projection (NISP), was conducted for the transitional ??-????
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Nur Fatin Fatina Mohd Ramli, Mohd Azuwan Mat Dzahir and Shin-Ichiroh Yamamoto
Depending on task requirements, a human is able to select distinct strategies such as the use of an ankle strategy and hip strategy to maintain their balance. Postural control actions often co-occur with other movements, and such movements may bring abou...
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Zinon Vlahostergios
In the current work a detailed investigation and a performance assessment of two eddy viscosity and two Reynolds stress turbulence models for modelling the transitional flow on a double circular arc (DCA) compressor blade is presented. The investigation ...
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Andrew D. Jensen, Mirseid G. Akperov, Igor I. Mokhov, Anthony R. Lupo and Fengpeng Sun
The dynamic character of an enstrophy-based diagnostic, previously used in the study of atmospheric blocking, is examined here, in near-term future simulations from the Institut Pierre Simon Laplace Climate Model version 4 (IPSL-CM4) and version 5 (IPSL-...
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