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Book
ISBN: 9783030693060 9783030693077 9783030693084 9783030693053 Year: 2021 Publisher: Cham Springer International Publishing :Imprint: Springer
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Fluid mechanics --- ingenieurswetenschappen --- vloeistoffen
Book
ISBN: 3031309359 3031309367 Year: 2023 Publisher: Cham Springer
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Digital
ISBN: 9783030693060 9783030693077 9783030693084 9783030693053 Year: 2021 Publisher: Cham Springer International Publishing
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This book contains a collection of the main contributions from the third edition of the NICFD conference, organized by the Special Interest Group on Non-Ideal Compressible Fluid Dynamics (SIG-49). It provides insight on the latest research findings in the field of NICFD that are relevant to a number of engineering applications related to the conversion of renewable and waste energy sources, like organic Rankine cycles, supercritical CO2 cycle power plants, combustors operating with supercritical fluids, and heat pumps. The various chapters of the book document research encompassing theoretical, computational, and experimental aspects of the gas dynamics of non-ideal reactive and non-reactive flows and their impact for the design of internal flow components (turbomachinery, heat exchangers, combustors). Since the accurate calculation of fluid thermo-physical properties is of great concern in NICFD, all the chapters address this problem by describing state-of-the-art models for the characterization of the properties of pure fluids and mixtures.
Fluid mechanics --- ingenieurswetenschappen --- vloeistoffen
Dissertation
Year: 2022 Publisher: Liège Université de Liège (ULiège)
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A numerical investigation concerning axisymmetric underexpanded turbulent flow issuing from a convergent-divergent nozzle is carried out by means of Reynolds averaged Navier-Stokes (RANS) equations and is contained in this work. The numerical computations are performed making use of the in-built axisymmetric solver of the open-source CFD software SU2 and regard the outflow expansion in case of jet release in a quiescent environment and in case of jet impingement on a flat plate. By doing so, this work proposes to investigate if the free-flow and impinging flow structures are sensitive to the shape of the nozzle used to accelerate the fluid, and if yes, to which extent. This is accomplished by considering three different nozzles: one contoured and two conical nozzles with different lengths. To cover a wider range of configuration, the nozzle-pressure-ratio (NPR) and the nozzle-to-plate distance are also varied. From the investigation of the flow field, it is found that the intensity of the shocks contained in both the core region and the impinging region of the jet are affected by the nozzle geometry, while the evolution of the radial wall-jet generated by the jet impingement is instead found to have rather small sensitivity. Validation and verification of the code is also performed in advance by replicating real experimental tests and comparing the obtained results with other numerical simulations found in literature.
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