Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Martini, Eduardo"'
Publikováno v:
Phys. Rev. Fluids 8, 073902. Published 14 July 2023
Reactive flow control has been shown as a promising tool to improve, among other aspects, the aerodynamic characteristics of an aircraft. This paper focuses on the use of reactive flow control to attenuate Tollmien-Schlichting (TS) waves over a wing
Externí odkaz:
http://arxiv.org/abs/2402.11063
Autor:
Audiffred, Diego B. S., Cavalieri, André V. G., Maia, Igor A., Martini, Eduardo, Jordan, Peter
We present an experimental study of reactive control of turbulent jets. We target axisymmetric disturbances associated with coherent structures, which are known to underpin the peak sound radiation of turbulent jets. We first consider a forced jet fl
Externí odkaz:
http://arxiv.org/abs/2402.10860
Publikováno v:
Journal of Fluid Mechanics, vol. 950, p. A9, 2022
Spectral proper orthogonal decomposition (SPOD) is an increasingly popular modal analysis method in the field of fluid dynamics due to its specific properties: a linear system forced with white noise should have SPOD modes identical to response modes
Externí odkaz:
http://arxiv.org/abs/2312.06057
Different transition to turbulence routes for the flow around blunt bodies are possible. Non-modal amplification of perturbations via the lift-up effect has recently been explored to explain transition near the stagnation point in axisymmetric bodies
Externí odkaz:
http://arxiv.org/abs/2311.02486
Hypersonic boundary layers exhibit diverse transition pathways, influenced by various flow conditions and environments. Non-modal mechanisms, such as the lift-up effect, are recognized as pivotal contributors to transition, particularly over complex
Externí odkaz:
http://arxiv.org/abs/2311.02463
Resolvent analysis is a powerful tool for studying coherent structures in turbulent flows. However, its application beyond canonical flows with symmetries that can be used to simplify the problem to inherently three-dimensional flows and other large
Externí odkaz:
http://arxiv.org/abs/2309.04617
This work aims to provide a more complete understanding of the resonance mechanisms that occur in turbulent jets at high subsonic Mach number, as shown by Towne et al. (2017). Resonance was suggested by that study to exist between upstream- and downs
Externí odkaz:
http://arxiv.org/abs/2304.04436
Installation noise is a dominant source associated with aircraft jet engines. Recent studies show that linear wavepacket models can be employed for prediction of installation noise, which suggests that linear control strategies can also be adopted fo
Externí odkaz:
http://arxiv.org/abs/2303.03176
Coherent structures are found in many different turbulent flows and are known to drive self-sustaining processes in wall turbulence. Identifying the triadic interactions which generate coherent structures can provide insights beyond what is possible
Externí odkaz:
http://arxiv.org/abs/2301.01078
Autor:
Martini, Eduardo
Periodogram methods are widely used for the estimation of power- and cross-spectra, of which Welch's method is the most popular. Previous studies have analyzed the variance of the power spectra estimates and developed analytical probability functions
Externí odkaz:
http://arxiv.org/abs/2207.12159