Search

Your search keyword '"Srinivasan, Kothandaraman"' showing total 3 results
Start Over Author "Srinivasan, Kothandaraman"
3 results on '"Srinivasan, Kothandaraman"'

1. Proper Orthogonal Decomposition analysis of mode switching in supersonic jets impinging on flat and corrugated plates.

Author

Sarangi, Debivarati, Karthik, Ramanujam, and Srinivasan, Kothandaraman

Subjects
MACH number, PROPER orthogonal decomposition, ACOUSTIC signal processing, SOUND pressure, ACOUSTIC emission
Abstract

Understanding the occurrence of various feedback mechanisms of an under-expanded impinging supersonic jet is a crucial task in research. The presence of several jet modes is examined in this study for the flat and corrugated impinging plate geometries. The behavior of impinging plate configurations during mode switching is investigated by varying the flow state, such as the jet Mach number. The staging behavior at various jet Mach numbers is observed using acoustic spectral plots and schlieren flow visualization. To explore the presence of various types of modes during the jet impingement due to the modification of jet Mach number, ensemble averaging and Proper Orthogonal Decomposition of schlieren images are carried out. In the majority of situations, the corrugated design shows a reduction in tonal noise and overall sound pressure level. In exceptional cases, for the corrugated plates, the enhanced overall sound pressure level is caused by the existence of axisymmetric instability (A1, A2). [ABSTRACT FROM AUTHOR]

Published
2024
Full Text
View/download PDF

3. Numerical Study of Two Dimensional Laminar Jet Flow Past a Sudden Expansion

Author

Srinivasan Kothandaraman, Sundararajan Thirumalachari, Gokul Chandrasekaran, and Mithun Jyothi

Subjects
Physics, geography, geography.geographical_feature_category, media_common.quotation_subject, Reynolds number, Laminar flow, Mechanics, Inlet, Aspect ratio (image), Asymmetry, Instability, Physics::Fluid Dynamics, symbols.namesake, Incompressible flow, symbols, Calculus, Duct (flow), circulatory and respiratory physiology, media_common
Abstract

A computational study of laminar plane jet flow past a plane symmetric sudden expansion configuration is presented. The dependence of asymmetric flow instability on the velocity profile at the expansion region has been studied. This variation in velocity profile at the expansion region is brought about by varying the length of the inlet duct. The attachment lengths of the jet for a range of Reynolds number (Re) values and aspect ratios (ratio of duct width to jet width) have been presented. An in-house two dimensional incompressible flow code has been developed for solving the problem. The Critical Reynolds Number (Recr) at which jet develops asymmetry with respect to mid-plane of the channel for a certain aspect ratio, increases as the inlet duct length is decreased. Hence, this indicates that the stability of the jet increases with the decrease in the inlet duct length. The shorter attachment length (SAL) remains nearly constant with increase in Re but longer attachment length (LAL) increases with increase in Re for various aspect ratios.

Published
2016
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results