Yijun Mao
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View article: Comparative Study of Prediction Methods for Tonal Noise Radiated by Periodic Flow in Turbomachinery
Comparative Study of Prediction Methods for Tonal Noise Radiated by Periodic Flow in Turbomachinery Open
Tonal noise radiated from the periodic flow induced by the stator-rotor interaction is a major acoustic source in turbomachinery. This paper introduces a multi-phase, multi-reference frame method (MMFM) for efficiently predicting periodic …
View article: Woronin body protein UvHex1 is essential for pathogenesis, and contributes to conidiation, cell stress response, lipid metabolism, and mycotoxins production in rice false smut fungus Ustilaginoidea virens
Woronin body protein UvHex1 is essential for pathogenesis, and contributes to conidiation, cell stress response, lipid metabolism, and mycotoxins production in rice false smut fungus Ustilaginoidea virens Open
Woronin bodies (WBs) are unique single-membrane microbodies derived from peroxisomes found in fungi within the Pezizomycotina subphylum. WBs can seal hyphal septa to prevent cytoplasmic leakage upon hyphal damage. The hexagonal peroxisomal…
View article: An experimental study on the velocity field in a mixed-flow fan
An experimental study on the velocity field in a mixed-flow fan Open
This study investigates velocity characteristics inside the mixed-flow fan through experimental measurements. The velocity is collected using a hot-wire anemometer and validated against Large Eddy Simulations (LES). The turbulence scales a…
View article: Flow characteristics analysis of an ultrathin forward-curved multi-blade centrifugal fan
Flow characteristics analysis of an ultrathin forward-curved multi-blade centrifugal fan Open
The ultrathin centrifugal fan, widely utilised in compact electronic devices such as laptops, is characterised by numerous forward-curved blades that generate high static pressure and flow rates. Despite its widespread application, the flo…
View article: Sources and mechanisms of flow loss and hydroacoustics in a pre-swirl stator pump-jet propulsor
Sources and mechanisms of flow loss and hydroacoustics in a pre-swirl stator pump-jet propulsor Open
Accurately identifying sources of flow loss and hydroacoustics and clarifying the mechanism of their generation are crucial for directing the optimal design of efficient and quiet pump-jet propulsors (PJPs). In this paper, numerical simula…
View article: Exploring the Impacts of Land Use/Cover Change on Ecosystem Services in Multiple Scenarios --The Case of Sichuan-Chongqing Region, China
Exploring the Impacts of Land Use/Cover Change on Ecosystem Services in Multiple Scenarios --The Case of Sichuan-Chongqing Region, China Open
To improve the environment of the ecosystem, China has implemented the Green-forGrain Program for two decades, which has resulted in an imbalance among ecology.economy and food. This study focuses on the "ecology-food" imbalance problem.ta…
View article: Investigation on multiple-frequency resonant characteristics of a Helmholtz resonator with an extended neck
Investigation on multiple-frequency resonant characteristics of a Helmholtz resonator with an extended neck Open
Helmholtz resonator (HR) is widely used in various fields, but the classic HR usually should satisfy the acoustically compact condition, which limits the application range of the classic HR. This paper investigates analytically and numeric…
View article: Experimental study of the parameter effects on the flow and noise characteristics for a contra-rotating axial fan
Experimental study of the parameter effects on the flow and noise characteristics for a contra-rotating axial fan Open
Introduction: In the present paper, experiments for a contra-rotating axial fan have been conducted to investigate the influences of the fan parameters including axial distance, blade number, blade pattern and blade thickness on the perfor…
View article: Comparative study of surface integral methods in aeroacoustic prediction
Comparative study of surface integral methods in aeroacoustic prediction Open
Introduction: Surface integral methods based on the acoustic analogy and Kirchhoff formulation are widely employed in computational aeroacoustics. The computational accuracy is usually highly dependent on the selections of the acoustic pre…
View article: A novel method for work capacity calculation of centrifugal compressor impellers in energy storage systems
A novel method for work capacity calculation of centrifugal compressor impellers in energy storage systems Open
As the basis for centrifugal compressor design, the traditional one-dimensional scheme assumes that there is no flow prewhirl at the impeller inlet (i.e., C1u=0) when inlet guide vanes (IGVs) are absent. However, various experiments have p…
View article: Numerical Study of Porous Treatments on Controlling Flow around a Circular Cylinder
Numerical Study of Porous Treatments on Controlling Flow around a Circular Cylinder Open
Porous materials fixed on and downstream the cylinder can reach a much better effect in suppressing wall pressure fluctuations. In the present paper, numerical comparative studies have been conducted to investigate passive control of flow …
View article: Flow Control of Radial Inlet Chamber and Downstream Effects on a Centrifugal Compressor Stage
Flow Control of Radial Inlet Chamber and Downstream Effects on a Centrifugal Compressor Stage Open
Radial inlet chambers are widely used in various multistage centrifugal compressors, although they induce extra flow loss and inlet distortions. In this paper, the detailed flow characteristics inside the radial inlet chamber of an industr…
View article: Numerical study of wake and potential interactions in a two-stage centrifugal refrigeration compressor
Numerical study of wake and potential interactions in a two-stage centrifugal refrigeration compressor Open
Both potential and wake interactions are usually the primary mechanisms related to the unsteadiness in turbomachines. However, it is usually difficult to distinguish their effects on flow evolution. This paper develops a direct and visual …
View article: Convective Vector Wave Equation of Aeroacoustics
Convective Vector Wave Equation of Aeroacoustics Open
This paper extends the vector wave equation of aeroacoustics to consider the effect of uniform flow. Analytical time-domain and frequency-domain acoustic velocity integral formulations for the monopole source are deduced. Test cases for so…