Numerical Approach in Aeroelasticity

Sloboda, Oskár; Korba, Peter; Hovanec, Michal; Píľa, Ján

doi:10.20858/sjsutst.2016.93.12

Cited by 3 publications

(2 citation statements)

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“…But even they have their limitations. Let's consider the example of the ANSYS Workbench software suite, in which it is possible to solve the hydroaeroelasticity problem using the Fluent Flow (Fluent) and Transient Structural modules, which combination is carried out by means of System Coupling [4,5]. Taking into account the fact, that in the research of separation elements not only the plug flow particle distribution is of interest, but also the motion of the trapped liquid film along the deposition surfaces.…”

Section: Introductionmentioning

confidence: 99%

Static calculation of the dynamic deflection elements for separation devices

Павленко¹,

Павленко²,

Pavlenko³

et al. 2017

JES

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The following paper considers the influence of acoustic oscillations on multiphase flows on their suspended particles, which can be destroyed or coagulated by vibrations. Considering this, the method of extension of application range of the dynamic separation element as vibrocoagulants due to the use of hydroaeroelasticity phenomena, namely flutter, has been proposed. There were considered the problems of development an engineering method for calculating dynamic separation elements, the main of which is the analytical solution of the hydroaeroelasticity problem. This work takes the first step to its development, considering the previous elastic elements deformation that has a significant effect on the flutter frequency. The state of their static equilibrium was conducted with the use of analytical dependencies of the finite element method. The bimodal finite elements with six degrees of freedom were used for dynamic deflection elements. As the result, there was determined the stiffness of pre-deformed plates and their maximum and minimum possible deflections. The functions of the median surface deflection in the form of a cubic polynomial were used in the model.In particular, there were considered the peculiarities of numerical modelling of coupled problems of gashydrodynamics flows and structural dynamics using the ANSYS Workbench, namely Fluent Flow and Transient Structural modules, which are combined with System Coupling. Also, the peculiarities of different approaches to multi-phase flow modelling are indicated. They are interesting not only by distribution of particles in the stream core, but also by the entrapped liquid film motion on the deposition surfaces.

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Section: Introductionmentioning

confidence: 99%

Static calculation of the dynamic deflection elements for separation devices

Павленко¹,

Павленко²,

Pavlenko³

et al. 2017

JES

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“…Computational fluid dynamics (CFD) uses discretisation methods that can simulate and analyse various problems of fluid dynamics. It has become an important means to solve all types of aerodynamic performance(Baker, 2010;Khier et al, 2000;Sloboda et al, 2016). To verify the drag reduction effect of the crocodile bionic electric locomotive, numerical simulations of aerodynamic drag were performed for the crocodile bionic and bluff body electric locomotives at different speeds in open air by using the CFD software, ANSYS FLUENT16.0.…”

mentioning

confidence: 99%

Bionic shape design of electric locomotive and aerodynamic drag reduction

Huo

Ding

et al. 2018

AoT

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Bionics has been widely used in many fields. Previous studies on the application of bionics in locomotives and vehicles mainly focused on shape optimisation of high-speed trains, but the research on bionic shape design in the electric locomotive field is rare. This study investigated a design method for streamlined electric locomotives according to the principles of bionics. The crocodiles were chosen as the bionic object because of their powerful and streamlined head shape. Firstly, geometric characteristic lines were extracted from the head of a crocodile by analysing the head features. Secondly, according to the actual size requirements of the electric locomotive head, a free-hand sketch of the bionic electric locomotive head was completed by adjusting the position and scale of the geometric characteristic lines. Finally, the non-uniform rational B-splines method was used to establish a 3D digital model of the crocodile bionic electric locomotive, and the main and auxiliary control lines were created. To verify the drag reduction effect of the crocodile bionic electric locomotive, numerical simulations of aerodynamic drag were performed for the crocodile bionic and bluff body electric locomotives at different speeds in open air by using the CFD software, ANSYS FLUENT16.0. The geometric models of crocodile bionic and bluff body electric locomotives were both marshalled with three cars, namely, locomotive + middle car + locomotive, and the size of the two geometric models was uniform. Dimensions and grids of the flow field were defined. And then, according to the principle of motion relativity, boundary conditions of flow field were defined. The results indicated that the crocodile bionic electric locomotive demonstrated a good aerodynamic performance. At the six sampling speeds in the range of 40–240 km/h, the aerodynamic drag coefficient of the crocodile bionic electric locomotive decreased by 7.7% on the average compared with that of the bluff body electric locomotive.

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Оптимізаційне Компонування Фазних Розділювачів З Застосуванням Модульних Сепараційних Пристроїв

Liaposhchenko¹,

Ivanov²,

Pavlenko³

et al. 2018

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У даній статті розглядаються способи підвищення ефективності, оптимізації та інтенсифікації процесів сепарації та сепараційного обладнання установок стабілізації нафти/конденсату. Робота включає в себе теоретичне ознайомлення з процесом сепарації газорідинних сумішей та труднощами, які пов’язані з ним. Проведено аналіз досліджуваного обладнання, а саме його конструктивних особливостей, принципу роботи, переваг та недоліків, визначена оптимальна компоновка апаратів. Запропоновано новий нестандартний підхід до вдосконалення існуючого сепараційного обладнання, а саме метод оптимізаційного компонування фазних розділювачів з застосуванням модульних сепараційних пристроїв. Було проведене комп’ютерне моделювання багатофазних течій у внутрішньому об’ємі вертикального фазного розділювача та одного з модульних сепараційних пристроїв, що реалізує спосіб динамічної сепарації. Достовірність комп’ютерного моделювання підтверджується верифікацією отриманих даних за результатом чисельного експерименту з режимними параметрами роботи сепаратора. Спосіб динамічної сепарації являється не традиційним методом розділення гетерогенних систем, його особливістю являється застосування автоматичного регулювання гідравлічного опору, де регулюючою дією є сили пружності. Для чисельного розрахунку гідродинаміки вертикального фазного розділювача використовувався програмний комплекс, що реалізує метод скінченних об’ємів, а саме FlowVision. Оскільки, при роботі модульного сепараційного пристрою мають місце аерогідропружні явища необхідно розглядати механіку руху газорідинного потоку з одного боку та твердого деформованого тіла з іншого боку. Враховуюче це для його дослідження використовувався програмний комплекс ANSYS Workbench, а саме модулі, які засновані на методах скінченних об’ємів та елементів, відповідно Fluid Flow Fluent та Transient Structural, об’єднанні за допомогою System Coupling. Наведені конструкції нових модульних сепараційних елементів та рекомендації для оптимізації їх компоновки у фазних розділювачах, що дозволять значно збільшити ефективність та інтенсивність процесів розділення емульсій та газорідинних сумішей і в цілому підвищать якість цільових компонентів. This article discusses ways of the efficiency improvement, optimization and intensification of the separation processes, which takes place in stabilizer units for oil and condensate. The work includes the theoretical introduction to the separation of gas-liquid mixtures and difficulties associated with process. Investigated equipment, specifically their design features, operating principle, advantages and disadvantages was analyzed, in consequence of which the optimal equipment packaging was determined. The non-typical approach for improvement of most commonly used separation equipment is proposed, namely method of optimizing phase separation equipment packaging, which includes using of modular separation devices. For this purpose numerical simulations of multiphase flow in the vertical phase separator internal volume and one of the modular separation devices, which implement the dynamic separation method, were carried out. The reliability of computer simulation is confirmed by verification data, which obtained from the results of numerical experiment, with the separator functioning parameters. The method of dynamic separation isn't traditional method for heterogeneous systems separation. The main feature of this method is using of hydraulic resistance automatic regulation, in this case regulating forces are the elastic forces. For numerical calculation of the vertical phase separator hydrodynamics was used software complex namely FlowVision, which implements the finite volume method. Since, in case of the modular separation devices functioning take place the aerohydroelasticitys phenomena’s, it is necessary to be consider mechanics of the gas-liquid flow motion of the on one side and mechanics of the solid deformable body on the other hand. Taking into account the above for investigations of this modular separation device was used the ANSYS Workbench software complex, namely modules, which are based on the finite volume and finite element methods, respectively Fluid Flow Fluent and Transient Structural, which combined by System Coupling module. The presented designs of new modular separation elements and recommendations for their optimal disposition in phase separation equipment will significantly increase the efficiency and intensity of emulsions and gas-liquid mixtures separation processes, moreover it's all will improve the quality of the target components.

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Numerical Approach in Aeroelasticity

Cited by 3 publications

References 1 publication

Static calculation of the dynamic deflection elements for separation devices

Static calculation of the dynamic deflection elements for separation devices

Bionic shape design of electric locomotive and aerodynamic drag reduction

Оптимізаційне Компонування Фазних Розділювачів З Застосуванням Модульних Сепараційних Пристроїв

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