Assessment of a Homogeneous Model for Simulating a Cavitating Flow in Water under a Wide Range of Temperatures

Le, Anh Dinh (2021) Assessment of a Homogeneous Model for Simulating a Cavitating Flow in Water under a Wide Range of Temperatures. Journal of Fluids Engineering - Transaction of the ASME . ISSN 0098-2202

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Abstract

The cavitating flow on a NACA0015 hydrofoil in water under a wide range of temperatures is simulated with or without non-condensation gas using a homogeneous model. Our simplified thermodynamic model is coupled with governing equations to capture the latent heat transfer in cavitation. A numerical evaluation proves its applicability through a comparison with experimental data. As a result, the numerical evaluation illustrates good agreement with measured data for both simulations with or without non-condensation gas. The expected prediction pressure coefficient is in better agreement with experimental data for high-temperature water compared to the existing numerical data. Although the temperature depression inside the cavity is confirmed numerically, the thermodynamic effect shows a weak impact on the cavitation behavior near the boiling temperature (100oC). The cavitating flow can therefore be simulated reasonably by an iso-thermal approach at a reasonable cost. The suppression of the void fraction as the water temperature increases is deduced by the flow behavior rather than the thermodynamic effect. Finally, the impact of a non-condensation gas is closely linked to the thermodynamic properties of the water and the flow behavior. The attached cavity position shifts closer to the hydrofoil leading edge significantly in high-temperature water, while an identical position is reproduced for room temperature conditions in comparison with the simulation without a non-condensation gas.

Item Type:	Article
Subjects:	Aerospace Engineering Engineering Mechanics Engineering Physics ISI-indexed journals
Divisions:	School of Aerospace Engineering (SAE)
Depositing User:	Dr Anh Le Dinh
Date Deposited:	31 May 2021 11:03
Last Modified:	31 May 2021 11:03
URI:	http://eprints.uet.vnu.edu.vn/eprints/id/eprint/4444

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