Direct Numerical Simulation of Interaction between Transient Flow and Blade Structure in a Modern Low-Pressure Turbine
نویسندگان
چکیده
• The interaction between the transient flow and blade structure vibration in a modern low-pressure turbine is analysed using high-fidelity direct numerical simulation method. unsteady downstream wakes are highly influenced by vibration. vortex structures directly associated with Unsteady Reynolds Averaged Navier–Stokes (URANS) models not able to capture separation behaviour of flow. At least 5 harmonics required resolve necessary harmonic balance A feature aeronautical Low-Pressure Turbine (LPT) high loadings complex, separated regimes. Most existing research have focused only on analysing such turbines. aerodynamics LPT, however, can be significantly field motion complex non-linear fashion which could lead aeroelastic instabilities as flutter. Therefore, understanding mechanism unsteadiness LPT essential examine stress levels ensure mechanical integrity. novelty this paper, first foremost, method explore flutter forced response T106A turbine, study effects various sources blade. Secondly, paper investigates identifies adequate working ranges method, has been widely used for aeromechanical analysis turbomachines, predicting due fluid-structure an LPT. Another emphasis determination capability model aeroelasticity involving This will bridge key gap knowledge modelling LPTs.
منابع مشابه
Ducted Turbine Blade Optimization Using Numerical Simulation
This paper presents a combined blade element (BE), computational fluid dynamics (CFD) method for performance analysis and optimization of ducted turbines. The model is similar to standard blade element momentum theory, except that CFD replaces the momentum equation for determining the induction factors. This eliminates many assumptions used in applying the typical blade element momentum (BEM) t...
متن کاملnumerical analysis of fluid structure interaction phenomenon on a turbine blade
in this paper, the fluid-structure interaction phenomenon and the research history are described. then due to the complex and specific working conditions of a turbine blade, we have investigated the phenomenon on this subject. the fluid-structure interaction on a turbine blade model has been simulated by using structural and fluid flow section of ansys software. a model of turbine blade with ai...
متن کاملNumerical Simulation of Micropolar Flow in a Channel under Osciatory Pressure Gradient
We numerically investigate the pulsatile flow and heat transfer of a micropolar fluid through a Darcy-Forchhmeir porous channel in the presence of wall transpiration. We use the central difference approximations for the spatial derivatives, whereas the time integration has been performed by employing the three steps explicit Runge-Kutta method to obtain the numerical solution. It i...
متن کاملNumerical simulation of the interaction forces between turbine meter and particles in a standpipe
A numerical study of the dynamic behaviour of a turbine meter measuring solid flowrate was carried out by use of the discrete element method. The simulation was conducted with a cylindrical standpipe of 30d in diameter and 40d high, filled with 30000 mono-sized spheres of diameter d, and with a turbine fixed at the centre of the standpipe at a height of 20d. The variations of the torque and rot...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: International Journal of Mechanical Sciences
سال: 2021
ISSN: ['1879-2162', '0020-7403']
DOI: https://doi.org/10.1016/j.ijmecsci.2020.106104