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Wyszukujesz frazę "Nazari, Abolfazl" wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
A study on performance of planing-wing hybrid craft
Autorzy:
Zeraatgar, Hamid
Rostami, Ali Bakhshandeh
Nazari, Abolfazl
Powiązania:
https://bibliotekanauki.pl/articles/259870.pdf
Data publikacji:
2012
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
hydrodynamics
ground effect
wing
planing
aerodynamics
VLM
Opis:
A hybrid craft is defined as a combination of different lifting surfaces. The lift force can be of aerodynamic or hydrodynamic character. This research deals with the conditions of using planing mono-hulls equipped with a couple of wings, called planing-wing hybrid craft. A parametric study is conducted by using Vortex Lattice Method to determine feasibility of using an aerodynamic wing mounted to planing craft. It has been determined that the wing area should be more than twice as much as the wetted surface of the craft, to get an effective wing for planing craft. Furthermore, the wing should be so designed as to obtain its high aspect ratio. Maximum lift force contribution resulting from different wing configurations considered in this study is less than 35 percent of the total hydrodynamic lift force at an arbitrary condition. On this basis it may be concluded that the wing may be effectively used only in special conditions, hence this is not recommended for general application.
Źródło:
Polish Maritime Research; 2012, 4; 16-22
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical analysis of stream renovation using MIKE 11-GIS and HEC-RAS5
Autorzy:
Nazari Giglou, Abolfazl
Powiązania:
https://bibliotekanauki.pl/articles/1844375.pdf
Data publikacji:
2021
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
ecological recovery
field site screening
hydrodynamics modelling
pre-post renovation
stream renovation
Opis:
The main purpose of river system is to renovate its old processes. This article represents the results of two numerical models and a field site screening results for the river renovation in Idaho, U.S.A and some restoration methodologies that have been used to better understand possible renovating strategy. Ecological recovery methods using a degraded stream ecosystem have been found after estimating a channel design's capability. Despite these representing methods it is hard to present the most effective method to get efficient renovative outcomes. Two hydrodynamics modelling (MIKE 11-GIS and HEC-RAS5) and field site screening are used to evaluate pre- and post-renovation modifies in 35 laboratory experiments and biological performance indicators. Movement formed between 1994 and 2014 have been considered in this research. Ecosystem improvements have been evaluated to compare the pre-post renovation situations by considering the parameters such as water surface elevation, lower slope, shear stress, depth, wet perimeter, and velocities. The numerical model results for all mentioned parameters show that after the completion of phase I, II, III and IV, the sinuosity of the channel will be very close to the 1986 condition. The sediment carrying capacity and potential use of MIKE 11-GIS, hydrodynamic model for scour has been reduced throughout the lower reaches of the project site, where the channel slope is at its steepest position, and a close match with the field site screening and have been shown and presented as graphs.
Źródło:
Journal of Water and Land Development; 2021, 48; 22-31
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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