@inproceedings{514a8f1805a84cb0b718ae8e4d54d7a2,
title = "Numerical verification of rapid-prototyped flexible surrogates of laboratory models of hydroturbines",
abstract = "– We report on parallel experimental and numerical studies of flow, internal unsteadiness, vortex instability and associated pressure pulsations in an air model of hydroturbine draft-tube operating at off-design conditions. The air-rig, equipped with automated Laser-Doppler velocimeter and sensitive microphones, accommodates different types of surrogate turbine rotors manufactured by rapid prototyping and 3D printing, making it possible to explore a large number of different turbine and draft-tube configurations. The part-load regimes reveal in draft-tube different patterns of precessing vortex cores in form of multiple or single helical ropes, accompanied by pressure pulsations with distinct peaks at the characteristic frequencies. The complementing LES as well as some of the RANS models reproduced well the flow patterns, vortex structures and the recorded pressure pulsations, supplementing the experiments with information that are inaccessible to measurements.",
author = "A. Minakov and I. Litvinov and D. Platonov and A. Dekterev and S. Shtork and K. Hanjali{\'c}",
note = "Publisher Copyright: {\textcopyright} 2018 Begell House, Inc.; 9th International Symposium on Turbulence Heat and Mass Transfer, THMT 2018 ; Conference date: 10-07-2018 Through 13-07-2018",
year = "2018",
doi = "https://doi.org/10.1615/THMT-18.900",
language = "الإنجليزيّة",
series = "Proceedings of the International Symposium on Turbulence, Heat and Mass Transfer",
publisher = "Begell House Inc.",
pages = "847--857",
booktitle = "THMT 2018 - Proceedings of the 9th International Symposium on Turbulence Heat and Mass Transfer",
address = "الولايات المتّحدة",
}
