Super-resolution of time-resolved three-dimensional density fields of the B mode in an underexpanded screeching jet

C Lee, Y Ozawa, T Nagata, T Nonomura - Physics of Fluids, 2023 - pubs.aip.org
The estimation of time-resolved three-dimensional (3D) density fields of an underexpanded
jet at the nozzle pressure ratio of 2.42, a so-called “spatiotemporal super-resolution” was …

Spatiotemporal superresolution measurement based on POD and sparse regression applied to a supersonic jet measured by PIV and near-field microphone

Y Ozawa, T Nagata, T Nonomura - Journal of Visualization, 2022 - Springer
The present study proposed the framework of the spatiotemporal superresolution
measurement based on the sparse regression with dimensionality reduction using the …

Robust shape optimization under model uncertainty of an aircraft wing using proper orthogonal decomposition and inductive design exploration method

G Demir, RM Gorguluarslan, S Aradag - Structural and Multidisciplinary …, 2023 - Springer
Robust aerodynamic shape optimization of aircraft components is a computationally
expensive process due to a high number of parametrized design variables of complex …

Lambda shock behaviors of elliptic supersonic jets; a numerical analysis with modification of RANS turbulence model

SAA Mirjalily - Aerospace Science and Technology, 2021 - Elsevier
Supersonic jets have various applications in different industries, particularly as the
propulsion of air-breathing engines and supersonic ejectors. The present study aimed to …

[HTML][HTML] Variational mode decomposition–based nonstationary coherent structure analysis for spatiotemporal data

Y Ohmichi - Aerospace Science and Technology, 2024 - Elsevier
The conventional modal analysis techniques face difficulties in handling nonstationary
phenomena, such as transient, nonperiodic, or intermittent phenomena. This paper presents …

Numerical investigation of shock-turbulent mixing layer interaction and shock-associated noise

F Shi, Z Gao, C Jiang, CH Lee - Physics of Fluids, 2021 - pubs.aip.org
Direct numerical simulation of shock-turbulent mixing layer interaction (STMLI) is conducted
in this paper to study the influence of shock-turbulent interaction (STI) on the turbulence …

Experimental study of airflow thermal fluctuation properties induced by liquid metal pouring based on schlieren and proper orthogonal decomposition

J Rong, Y Huang, Z Li, W Wang, J Guo… - Thermal Science and …, 2024 - Elsevier
Understanding the thermal fluctuation characteristics of the induced airflow during liquid
metal pouring processes aids in effective control of emissions from metallurgical plants. This …

Data assimilation of ideally expanded supersonic jet using rans simulation for high-resolution piv data

Y Ozawa, T Nonomura - Aerospace, 2024 - mdpi.com
Data assimilation using particle image velocimetry (PIV) and Reynolds-averaged Navier–
Stokes (RANS) simulation was performed for an ideally expanded supersonic jet flying at a …

The source localization and dynamical evolution of axisymmetric screech modes in underexpanded supersonic jets

H Li, Y Luo, S Han, Y Wang, C Wu, R Ma - Aerospace Science and …, 2023 - Elsevier
High order numerical simulations of underexpanded supersonic cold jets issuing from a
circular sonic nozzle are conducted to investigate the effective source location of …

Research on jet noise characteristics of aeroengine double S-bend nozzles with different cross sections

J Shao, X Mo, Z Zheng, Y Yang - … of Numerical Methods for Heat & …, 2022 - emerald.com
Research on jet noise characteristics of aeroengine double S-bend nozzles with different cross
sections | Emerald Insight Books and journals Case studies Expert Briefings Open Access …