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Showing result 1 - 5 of 7 essays matching the above criteria.

1. 1. Forced response numerical investigation of a transonic compressor rotor

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

   Author : Mariana Pires Gonçalves Toco Dias; [2023]
   Keywords : Compressor; rotor; blisk; aeroelasticity; aerodynamic damping; CFD; transient; forced response;

   Abstract : The present thesis discusses the forced response of a rotor’s bladed-disk when excited by the periodic force produced by a wake generator, or Inlet Guide Vane (IGV),with 8 equally-spaced blades. These components are part of an axial transonic compressor rig, moreover the Transonic Compressor Darmstadt 1 (TCD1), located at the Technical University of Darmstadt. READ MORE

3. 2. Numerical Investigation of Various Modelling Strategies for Throttling a Transonic Compressor Rig Diffuser

   University essay from KTH/Kraft- och värmeteknologi

   Author : Borzou Dargahi; [2019]
   Keywords : ;

   Abstract : The concern of this study is modeling of the flow field in the diffuser of a 1.5 stage compressor test rig in which the mass flow is constrained at the exit of the diffuser. Constraining method is is applied through, throttling by means of a slab at the exit of the diffuser, where the flow enters the exit volute. READ MORE

4. 3. 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

5. 4. Determination of aerodynamic damping at high reduced frequencies

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

   Author : Minghao Pan; [2017]
   Keywords : Aerodynamic damping; reduced frequency; forced response; acoustic mode; acoustic resonance; Aerodynamisk dämpning; reducerad frekvens; aerodynamiskt påtvingade vibrationer; akustiskt svängningsform; akustisk resonans;

   Abstract : Forced response which is blade vibration due to an external excitation can lead to blade failure. The estimation of the level of vibration is dependent on the determination of aerodynamic damping. This thesisinvestigates the determination of aerodynamic damping at high reduced frequencies in turbomachines. READ MORE

6. 5. Effect of Axial Gap Distance on Transonic Compressor Performance

   University essay from KTH/Kraft- och värmeteknologi

   Author : Joseph Sadek; [2015]
   Keywords : Axial Gap Distance; Transonic Compressors; Aerodynamic Performance; CFD; Harmonic Balance; inter-row gap;

   Abstract : The modern trend of gas turbines design is towards lighter, highly efficient,and more compact engines. Such situation imposes on engineers to continuouslysearch for improved and optimum designs. The thesis presented aims at researching possible performance improvements regarding axial gapdistance in transonic compressors. READ MORE