About this Research Topic
Over the past few decades, hydraulic machinery designed to transfer energy between a rotor and a fluid have been well developed and widely used in various scenarios. Although in the past it was mainly used to transport a single fluid, in recent years the process of transporting the mixture of several fluids has attracted increasing attention, i.e., cavitating flows due to pressure change, transport of gas-liquid flows in the petroleum industry and solid-liquid flows with associated erosion. Such multiphase flow phenomena can usually lead to flow instability and then fluid-solid interaction, e.g., erosion, vibration and noise. Therefore, it is of great importance to study the multiphase flow and induced multi-field interaction problems inside hydraulic machinery, which will contribute much to their safe and stable operation.
Due to the importance of multiphase flow and multi-field interaction problems in hydraulic machinery, many efforts have been made to gain an in-depth understanding of the mechanism of these phenomena. The technique of high-speed photography has been introduced to visualize multiphase flow fields, and various mathematical models have been constructed to accurately describe the flow characteristics, i.e., the cavitation model and the interphase forces. However, due to the complex geometry of hydraulic machinery, especially the curved blades in impellers and diffusers, it is still quite challenging to perform experimental and numerical studies on multiphase flows and multi-field interaction for hydraulic machinery. Therefore, in this research topic, the experimental measurements and numerical simulations will be collected to address the underlying mechanism of multiphase flow and multi-field interaction in hydraulic machinery, and then provide optimization schemes to improve the performance of hydraulic machinery.
This research topic focuses on recent advances in experimental and numerical studies of multiphase flow and multi-field interaction in hydraulic machinery, including research and review papers in the following areas, but not limited to:
(1) hydraulic machinery under cavitation condition;
(2) hydraulic machinery that delivers gas-liquid mixtures;
(3) hydraulic machinery that delivers solid-liquid mixtures;
(4) fluid-structure interaction in hydraulic machinery;
(5) wear and erosion in hydraulic machinery;
(6) experimental visualization and measurement of multiphase flows;
(7) numerical methods for multiphase flow and fluid-structure interaction;
(8) modeling of cavitation and interphase forces;
(9) design and optimization of hydraulic machinery under multiphase conditions;
(10) design and optimization of hydraulic machinery considering multi-field interaction.
Due to the importance of multiphase flow and multi-field interaction problems in hydraulic machinery, many efforts have been made to gain an in-depth understanding of the mechanism of these phenomena. The technique of high-speed photography has been introduced to visualize multiphase flow fields, and various mathematical models have been constructed to accurately describe the flow characteristics, i.e., the cavitation model and the interphase forces. However, due to the complex geometry of hydraulic machinery, especially the curved blades in impellers and diffusers, it is still quite challenging to perform experimental and numerical studies on multiphase flows and multi-field interaction for hydraulic machinery. Therefore, in this research topic, the experimental measurements and numerical simulations will be collected to address the underlying mechanism of multiphase flow and multi-field interaction in hydraulic machinery, and then provide optimization schemes to improve the performance of hydraulic machinery.
This research topic focuses on recent advances in experimental and numerical studies of multiphase flow and multi-field interaction in hydraulic machinery, including research and review papers in the following areas, but not limited to:
(1) hydraulic machinery under cavitation condition;
(2) hydraulic machinery that delivers gas-liquid mixtures;
(3) hydraulic machinery that delivers solid-liquid mixtures;
(4) fluid-structure interaction in hydraulic machinery;
(5) wear and erosion in hydraulic machinery;
(6) experimental visualization and measurement of multiphase flows;
(7) numerical methods for multiphase flow and fluid-structure interaction;
(8) modeling of cavitation and interphase forces;
(9) design and optimization of hydraulic machinery under multiphase conditions;
(10) design and optimization of hydraulic machinery considering multi-field interaction.
Keywords: multiphase flow, fluid-structure interaction, hydraulic machinery, gas-liquid flow, solid-liquid flow, cavitating flow
Important Note: All contributions to this Research Topic must be within the scope of the section and journal to which they are submitted, as defined in their mission statements. Frontiers reserves the right to guide an out-of-scope manuscript to a more suitable section or journal at any stage of peer review.
