Essays about: "Instabilities Flow"

Showing result 1 - 5 of 19 essays containing the words Instabilities Flow.

1. 1. A numerical comparison of the thermoacoustics for different equivalence ratios for n-dodecane using LES

   University essay from Lunds universitet/Institutionen för energivetenskaper

   Author : Björn Jarfors; [2023]
   Keywords : Computational Fluid Dynamics; Bluff-body stabilised flames; Large Eddy Simulation; Thermoacoustics; Acoustics; NEUMANN Project; Jet engines; Aero engines; Airplanes; Combustion; Numerics; Technology and Engineering;

   Abstract : Klimatförändringarna påverkar vår värld och det behövs ett mer hållbart samhälle. Flygindustrin är i behov av förändring, men flygmotorer är mycket komplexa och tar tid att utveckla. Termoakustiska instabiliteter har kraften att förstöra en motor, men också att minska miljöpåverkan. READ MORE

3. 2. Numerical analysis of aerodynamic damping in a transonic compressor

   University essay from KTH/Skolan för industriell teknik och management (ITM)

   Author : Vincenzo Stasolla; [2019]
   Keywords : transonic compressor; flutter; vibration; CFD; transonic kompressor; fladder; vibration; CFD;

   Abstract : Aeromechanics is one of the main limitations for more efficient, lighter, cheaper and reliable turbomachines, such as steam or gas turbines, as well as compressors and fans. In fact, aircraft engines designed in the last few years feature more slender, thinner and more highly loaded blades, but this trend gives rise to increased sensitivity for vibrations induced by the fluid and result in increasing challenges regarding structural integrity of the engine. READ MORE

4. 3. Numerical ice sheet modelling using FEniCS

   University essay from Uppsala universitet/Institutionen för informationsteknologi

   Author : André Löfgren; [2019]
   Keywords : ;

   Abstract : The increase in computational power in the last 20 years has made it feasible to solve the full Stokes equation for ice flow, using finite element methods (FEM). However, the numerical properties of these equations remains largely unknown. This is due to their nonlinear nature, which makes them hard to analyze mathematically. READ MORE

5. 4. Exprimental Study of Spin-Up of a Fluid-Filled Cylindrical Tank

   University essay from Lunds universitet/Institutionen för energivetenskaper

   Author : Jakob Svensson; [2018]
   Keywords : CFD Computational Fluid Dynamics Experimental Physics Spinning Spin Flow Laser Image Analysis Acceleration Ekman Boundary Layer Rossby Vortex Parabola Particles; Physics and Astronomy;

   Abstract : To ensure safety on upper stage rockets, the fluid dynamic phenomenon known as sloshing in the liquid propellant tanks needs to be understood. CFD is a relatively cheap tool, but studies by Schmitt [7] suggest that models currently used for simulations do not predict the flow behavior. READ MORE

6. 5. CFD Analysis of Pressure Instabilities in Stator-Rotor Disc Cavity Systems

   University essay from Linköpings universitet/Mekanisk värmeteori och strömningslära

   Author : Pedro Santiago Parras Blázquez; [2017]
   Keywords : ;

   Abstract : The continuous demand to improve turbine performance has led manufactures to focus on aspects that have been previously considered of secondary importance such as the secondary air system. The purpose of this system is to cool the components and prevent ingestion of hot gas into the stator-rotor cavity that could lead to low frequency pressure fluctuations called Cavity Flow Instabilities. READ MORE