Investigation of inertial particle separator from a broader perspective

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ABurakDaldalThesis.pdf

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2023-1-06

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Daldal, Abdurrahman Burak

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Inertial particle separator (IPS) is an engine integrated device to provide protection for foreign objects such as sand, dust etc. Due to the fact that IPS performance has a direct impact on the engine life, accurate estimation of separation efficiency becomes more important. When an engine is installed on a helicopter, it requires an intake system and aerodynamic characteristics of the incoming flow of the IPS changes significantly according to the intake system design. In this study, intake effect on IPS performance is investigated with the method that provides the most accurate results in the literature which uses unsteady approach and IDDES turbulence model. Results show that swirling flow which is formed due to the intake system design increases the IPS separation performance. The method used in this study requires high computational power and time. However, this kind of power may not be available or this kind of accuracy may not require at the preliminary design stages. For this kind of situations, 2-D approaches and cheaper turbulence models like RANS approach can be used. In the later chapters of this study, RANS turbulence models are investigated for 2-D IPS model. Lag Elliptic Blending k-ε turbulence model provide better results than Spalart-Allmaras, SST k-ω and Realizable k-ε turbulence models but, there is still significant error. A fine-tuning study is performed to increase the accuracy level. 𝐶𝜀1, 𝐶𝜀2, 𝜎𝑘 and 𝜎𝜀 closure coefficients are tuned and a new set of closure coefficients are obtained with a 24% performance improvement.

Subject Keywords

Annular Inertial Particle Separator Efficiency, Lagrangian Method, Detached Eddy Simulation Turbulence Model, Lag Elliptic Blending Turbulence Model, Turbulence Model Fine-Tuning

URI

https://hdl.handle.net/11511/101932

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

A. B. Daldal, “Investigation of inertial particle separator from a broader perspective,” M.S. - Master of Science, Middle East Technical University, 2023.