Zobrazeno 1 - 10
of 24
pro vyhledávání: '"Andrei Dragomirescu"'
Autor:
ANDREI DRAGOMIRESCU, ADRIAN CIOCĂNEA
Publikováno v:
Journal of Engineering Studies and Research, Vol 21, Iss 3 (2015)
The paper presents an original solution for increasing air quality and reducing energy consumption of the local indoor ventilation by using cross-flow fans. The solution is a combination between the local exhaust ventilation (LEV) technique from indu
Externí odkaz:
https://doaj.org/article/151468aa069c480eb7fdb2948137db63
Autor:
Andrei Dragomirescu
Publikováno v:
2021 10th International Conference on ENERGY and ENVIRONMENT (CIEM).
Autor:
Andrei Dragomirescu
Publikováno v:
2019 International Conference on ENERGY and ENVIRONMENT (CIEM).
This paper proposes a method for optimally choosing the radial gap between the impeller and the vaned diffuser of a centrifugal turbocompressor. The method is based on analyzing the streamlines resulting from numerical simulations of the flow induced
Publikováno v:
Energy Procedia. 136:424-429
Cross flow micro turbines are environmentally friendly equipment. A low head Banki turbine is studied in this paper numerically and experimentally in order to identify the reasons why the turbine efficiency is poor at low rotational speeds. A procedu
Autor:
Andrei Dragomirescu
Publikováno v:
IOP Conference Series: Earth and Environmental Science. 664:012034
Archimedean screws have been used for centuries, but only for pumping water. In the last decades, a growing interest appeared to also use them as hydro turbines for electricity generation. While Archimedean screws are already well optimized for worki
Publikováno v:
Energy Procedia. 112:217-224
The main goal of the study presented in this paper is to propose a non-invasive method based on digital image processing to assess the global void fraction for both the vortex and the air bubbles that form in a gas-liquid stirred vessel. Three impell
Autor:
Mihai Schiaua, Andrei Dragomirescu
Publikováno v:
Energy Procedia. 112:43-50
This paper presents the results of a combined experimental and numerical study on a Banki turbine with horizontal nozzle, operating at heads and discharges that go below 5% and 30%, respectively, of the rated values. The experimental results suggest
Publikováno v:
E3S Web of Conferences, Vol 85, p 06006 (2019)
This paper presents an experimental study of the vibrations induced both by cavitating and by non-cavitating flow in a hydraulic installation that comprises the main elements of a water hydraulic system. The cavitation was triggered by progressively
Publikováno v:
2018 International Conference and Exposition on Electrical And Power Engineering (EPE).
This paper presents results of experimental investigations on the frequency domains of cavitation-induced vibrations at an orifice plate and at a butterfly valve. These are two components that are often encountered in hydraulic installations. Orifice
Autor:
Andrei Dragomirescu
Publikováno v:
Applied Mechanics and Materials. 841:286-291
Fan impellers are usually designed considering that the pumped air is incompressible and homogeneous, i.e. its density remains constant. When the incompressibility hypothesis can lead to significant errors, as in the case of high pressure fans, the a