Zobrazeno 1 - 10
of 30
pro vyhledávání: '"M. J. Cervantes"'
Publikováno v:
Journal of Applied Fluid Mechanics, Vol 17, Iss 4, Pp 770-784 (2024)
The hydraulic turbines, especially Francis turbines, frequently run at part load (PL) conditions to meet the dynamic energy needs. The flow field at the runner exit changes significantly with a change in the operating point. At PL, flow instabilities
Externí odkaz:
https://doaj.org/article/e0fc2f4e1b104de4ba13fd4034ad4c73
Publikováno v:
Journal of Applied Fluid Mechanics, Vol 12, Iss 5, Pp 1463-1473 (2019)
The aim of the paper is to investigate the limitations of unsteady Reynolds-averaged Navier-Stokes (RANS) simulations of the flow in an axial turbine. The study is focused on modelling the pressure pulsations monitored on the runner blades. The scann
Externí odkaz:
https://doaj.org/article/50b2ad79d6394b4da79b71f0446f1bf9
Publikováno v:
Journal of Applied Fluid Mechanics, Vol 12, Iss 5, Pp 1449-1461 (2019)
This paper investigates the accuracy of Reynolds-averaged Navier-Stokes (RANS) turbulence modelling applied to complex industrial applications. In the context of the increasing instability of the energy market, hydropower plants are frequently workin
Externí odkaz:
https://doaj.org/article/fc433cdc264847a48a4dc03fb55dca5d
Publikováno v:
Journal of Applied Fluid Mechanics, Vol 11, Iss 3, Pp 527-544 (2018)
The present work aims to investigate different methodologies for the numerical simulation of an upwind three-bladed wind turbine; which is supposed to be a base model to simulate icing in cold climate windmills. That is a model wind turbine for which
Externí odkaz:
https://doaj.org/article/a5cf099d26f941009823a642732e927f
Publikováno v:
Journal of Applied Fluid Mechanics, Vol 10, Iss 4, Pp 1045-1059 (2017)
The rotor-stator interaction and the corresponding pressure fluctuations represent one of the sources of pressure and load fluctuations on the rotating parts of rotating machineries. The high-Reynolds flow is subject to rotation in the comparably lar
Externí odkaz:
https://doaj.org/article/144d6763df4c4dae8a0dbe8c783070be
Publikováno v:
Journal of Applied Fluid Mechanics, Vol 10, Iss 4, Pp 1029-1043 (2017)
In this paper, numerical investigation of three-dimensional, developing turbulent flow, subjected to a moderate adverse pressure gradient, has been investigated using various turbulence models, namely: the low-Re , the SST , the and a variant of Reyn
Externí odkaz:
https://doaj.org/article/a1c82a318bc9436cbe88377a38dd54e7
Publikováno v:
Journal of Applied Fluid Mechanics, Vol 10, Iss 1, Pp 11-20 (2017)
Pressurized pipeline systems may have a wide operating regime. This paper presents the experimental analysis of the transient flow in a horizontal pipe containing an air pocket, which allows the ventilation of the air after the pressurization of the
Externí odkaz:
https://doaj.org/article/47df3275534749b8a8cc7cc5357fe5e2
Publikováno v:
Journal of Applied Fluid Mechanics, Vol 9, Iss 5, Pp 2427-2434 (2016)
The paper presents a new method for in site discharge estimation in pressured pipes. The method consists in using the water hammer equations solved with the method of characteristics with an unsteady friction factor model. The differential pressure h
Externí odkaz:
https://doaj.org/article/5d1f2ff872c6475aa01d7c0e885b2515
The present study introduces the concept of mitigating pressure pulsations in a hydro-turbine draft tube. The concept refers to using an adjustable guide vane system in the draft tube. The adjustability relates to its ability to rotate around an axis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7755b52503434323ae907ccfc9198e9b
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-93291
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-93291
The flow rate is a challenging hydrodynamic parameter to measure in order to determine turbine efficiency. The pressure-time method is a cost-effective alternative to estimate the flow rate. Its principle is based on the transformation of momentum in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7669119f8dbb6d31663f8e811a5ccb27
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-92697
http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-92697