Theoretical and Applied Mechanics
RUS  ENG    ЖУРНАЛЫ   ПЕРСОНАЛИИ   ОРГАНИЗАЦИИ   КОНФЕРЕНЦИИ   СЕМИНАРЫ   ВИДЕОТЕКА   ПАКЕТ AMSBIB  
Общая информация
Последний выпуск
Архив

Поиск публикаций
Поиск ссылок

RSS
Последний выпуск
Текущие выпуски
Архивные выпуски
Что такое RSS



Theor. Appl. Mech.:
Год:
Том:
Выпуск:
Страница:
Найти






Персональный вход:
Логин:
Пароль:
Запомнить пароль
Войти
Забыли пароль?
Регистрация


Theoretical and Applied Mechanics, 2021, том 48, выпуск 2, страницы 143–157
DOI: https://doi.org/10.2298/TAM211011008S
(Mi tam92)
 

Towards viable flow simulations of small-scale rotors and blade segments

Jelena Svorcan, Aleksandar Kovačević, Dragoljub Tanović, Mohammad Sakib Hasan

Department of Aeronautics, University of Belgrade, Faculty of Mechanical Engineering, Belgrade, Serbia
Список литературы:
Аннотация: The paper focuses on the possibilities of adequately simulating complex flow fields that appear around small-scale propellers of multicopter aircraft. Such unmanned air vehicles (UAVs) are steadily gaining popularity for their diverse applications (surveillance, communication, deliveries, etc.) and the need for a viable (i.e. usable, satisfactory, practical) computational tool is also surging. From an engineering standpoint, it is important to obtain sufficiently accurate predictions of flow field variables in a reasonable amount of time so that the design process can be fast and efficient, in particular the subsequent structural and flight mechanics analyses. That is why more or less standard fluid flow models, e.g. Reynolds-averaged Navier–Stokes (RANS) equations solved by the finite volume method (FVM), are constantly being employed and validated. On the other hand, special attention must be given to various flow peculiarities occurring around the blade segments shaped like airfoils since these flows are characterized by small chords (length-scales), low speeds and, therefore, low Reynolds numbers (Re) and pronounced viscous effects. The investigated low-Re flows include both transitional and turbulent zones, laminar separation bubbles (LSBs), flow separation, as well as rotating wakes, which require somewhat specific approaches to flow modeling (advanced turbulence models, fine spatial and temporal scales, etc). Here, the conducted computations (around stationary blade segments as well as rotating rotors), closed by different turbulence models, are presented and explained. Various qualitative and quantitative results are provided, compared and discussed. The main possibilities and obstacles of each computational approach are mentioned. Where possible, numerical results are validated against experimental data. The correspondence between the two sets of results can be considered satisfactory (relative differences for the thrust coefficient amount to 15%, while they are even lower for the torque coefficient). It can be concluded that the choice of turbulence modeling (and/or resolving) greatly affects the final output, even in design operating conditions (at medium angles-of-attack where laminar, attached flow dominates). Distinctive flow phenomena still exist, and in order to be adequately simulated, a comprehensive modeling approach should be adopted.
Ключевые слова: CFD, turbulence, propeller, airfoil.
Финансовая поддержка Номер гранта
Ministarstvo prosvete, nauke i tehnološkog razvoja Republike Srbije 451-03-9/2021-14/200105
It is supported by the Ministry of Education, Science, and Technological Development of the Republic of Serbia through contract no. 451-03-9/2021-14/200105.
Поступила в редакцию: 11.10.2021
Принята в печать: 27.10.2021
Реферативные базы данных:
Тип публикации: Статья
MSC: 76D05, 76F06, 76M12
Язык публикации: английский
Образец цитирования: Jelena Svorcan, Aleksandar Kovačević, Dragoljub Tanović, Mohammad Sakib Hasan, “Towards viable flow simulations of small-scale rotors and blade segments”, Theor. Appl. Mech., 48:2 (2021), 143–157
Цитирование в формате AMSBIB
\RBibitem{SvoKovTan21}
\by Jelena~Svorcan, Aleksandar~Kova{\v{c}}evi{\'c}, Dragoljub~Tanovi{\'c}, Mohammad~Sakib~Hasan
\paper Towards viable flow simulations of small-scale rotors and blade segments
\jour Theor. Appl. Mech.
\yr 2021
\vol 48
\issue 2
\pages 143--157
\mathnet{http://mi.mathnet.ru/tam92}
\crossref{https://doi.org/10.2298/TAM211011008S}
\scopus{https://www.scopus.com/record/display.url?origin=inward&eid=2-s2.0-85124754639}
Образцы ссылок на эту страницу:
  • https://www.mathnet.ru/rus/tam92
  • https://www.mathnet.ru/rus/tam/v48/i2/p143
  • Citing articles in Google Scholar: Russian citations, English citations
    Related articles in Google Scholar: Russian articles, English articles
    Theoretical and Applied Mechanics
    Статистика просмотров:
    Страница аннотации:69
    PDF полного текста:31
    Список литературы:21
     
      Обратная связь:
     Пользовательское соглашение  Регистрация посетителей портала  Логотипы © Математический институт им. В. А. Стеклова РАН, 2024