Education

Research Description

Dr. Subbareddy's research interests are in the simulation and analysis of transitional and turbulent high speed flows. Currently, he is involved in projects that involve the construction of high-fidelity tools for the efficient solution of these problems and in work that uses these tools to study a wide range of flowfields.

Publications

LES of Subsonic Reacting Mixing Layers

Kartha, A., Subbareddy, P. K., & Candler, G. V. (2019), FLOW TURBULENCE AND COMBUSTION. https://doi.org/10.1007/s10494-019-00066-4

On the mean structure of sharp-fin-induced shock wave/turbulent boundary layer interactions over a cylindrical surface

Pickles, J. D., Mettu, B. R., Subbareddy, P. K., & Narayanaswamy, V. (2019), JOURNAL OF FLUID MECHANICS, 865, 212–246. https://doi.org/10.1017/jfm.2019.53

Gas density field imaging in shock dominated flows using planar laser scattering

Pickles, J. D., Mettu, B. R., Subbareddy, P. K., & Narayanaswamy, V. (2018), Experiments in Fluids, 59(7). https://doi.org/10.1007/s00348-018-2562-8

Scalar conservation and boundedness in simulations of compressible flow

Subbareddy, P. K., Kartha, A., & Candler, G. V. (2017), Journal of Computational Physics, 348, 827–846. https://doi.org/10.1016/j.jcp.2017.08.001

Detached-eddy simulations of hypersonic capsule wake flow

Brock, J., Subbareddy, P., & Candler, G. (2015), AIAA Journal. https://doi.org/10.2514/1.j052771

Direct numerical simulation of high-speed transition due to an isolated roughness element

Subbareddy, P. K., Bartkowicz, M. D., & Candler, G. V. (2014), Journal of Fluid Mechanics, 748, 848–878. https://doi.org/10.1017/JFM.2014.204

Decoupled implicit method for aerothermodynamics and reacting flows

Candler, G., Subbareddy, P., & Nompelis, I. (2013), AIAA Journal, 51(5). https://doi.org/10.2514/1.j052070

A fully discrete, kinetic energy consistent finite-volume scheme for compressible flows

Subbareddy, P. K., & Candler, G. V. (2009), Journal of Computational Physics, 228(5). https://doi.org/10.1016/j.jcp.2008.10.026

View all publications via NC State Libraries

Grants

Fluid Structure Interactions between unsteady shock waves and compliant materials for unsteady load mitigation

(11/16/20 - 11/15/23)

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Fluid Structure Interactions between unsteady shock waves and compliant materials for unsteady load mitigation

Sponsor:

Start Date: 11/16/20

End Date: 11/15/23

Abstract

The objective of the proposed effort is to study the use of fluid structure interactions with compliant materials to obtain positive outcomes in supersonic flows.

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Transition Prediction and Control for Blunt Hypersonic Configurations with Hemispherical and Ogival Nosetips

(4/27/20 - 3/31/23)

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Transition Prediction and Control for Blunt Hypersonic Configurations with Hemispherical and Ogival Nosetips

Sponsor:

Start Date: 4/27/20

End Date: 3/31/23

Abstract

This is a computational investigation into the physical mechanisms that lead to the onset of boundary layer transition (BLT) within the swallowing distance of the entropy layer on slender hypersonic vehicles with blunt, hemispherical or ogival nosetips.

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Machine Learning for Transition Modeling of Boundary Layer Flows

(7/25/19 - 7/24/20)

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Machine Learning for Transition Modeling of Boundary Layer Flows

Sponsor:

Start Date: 7/25/19

End Date: 7/24/20

Abstract

The expected outcome of this activity is an improved knowledge base that contributes to enhanced understanding of the transitional flow phenomena, and hence, to more accurate modeling of transitional and turbulent flows encountered in aerospace applications. This activity will support the CFD Vision 2030 and may also result in conference presentations and publications in technical journals.

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Large Eddy Simulation (LES) Flow Solver Suitable for Modeling Conjugate Heat Transfer

(9/11/19 - 3/11/20)

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Large Eddy Simulation (LES) Flow Solver Suitable for Modeling Conjugate Heat Transfer

Sponsor:

Start Date: 9/11/19

End Date: 3/11/20

Abstract

The objective is to develop computationally efficient, Computational Fluid Dynamics (CFD), flow modeling toolsets suitable for modeling 3D time-resolved conjugate heat transfer (CHT) for use in predicting thermal behavior of aircraft parts including gas turbine (GT) engines. We seek to further develop and improve the accuracy of the CHT predictions using Wall-Modeled LES (WMLES) approaches. AT NCSU, we have been developing WMLES capability and have well validated tools for this. The project will combine this with Kord's CHT capability.

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Non-intrusive Flight Trajectory Manipulation of High-speed Munitions Using Non-linear Shock/Boundary Layer Interactions

(3/08/21 - 3/07/24)

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Non-intrusive Flight Trajectory Manipulation of High-speed Munitions Using Non-linear Shock/Boundary Layer Interactions

Sponsor:

Start Date: 3/08/21

End Date: 3/07/24

Abstract

The vision of the proposed research is to remotely alter the flight trajectory of high-speed projectiles as a possible defense strategy against munition strikes that minimizes collateral damage. To this end, we propose to investigate manipulating the non-linear shock/boundary layer interactions (SBLI) around the munition control fins with the aim of creating amplified perturbation forces and moments. Such manipulation can be achieved by introducing steady and unsteady distortions into the missile boundary layer that interacts with the control-fin shock by several interception strategies described earlier. In this effort, we consider generic boundary layer distortions of various magnitudes, study the resulting SBLI responses, and map the sensitive perturbation regions using state-of-the-art experimental and computational tools. To maintain relevance to the Navy's goals and capabilities, the boundary layer distortions will be created either using small sized dents on the model surface or by embedding an unsteady wake field.

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Structure and Modeling of Hypersonic Boundary Layers in Transitional and Turbulent Regimes

(4/01/17 - 5/31/21)

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Structure and Modeling of Hypersonic Boundary Layers in Transitional and Turbulent Regimes

Sponsor:

Start Date: 4/01/17

End Date: 5/31/21

Abstract

The project is concerned with fundamental numerical investigation of hypersonic transitional and turbulent boundary layers.

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Structure and Modeling of Hypersonic Boundary Layers in Transitional and Turbulent Regimes

(7/01/16 - 9/30/17)

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Structure and Modeling of Hypersonic Boundary Layers in Transitional and Turbulent Regimes

Sponsor:

Start Date: 7/01/16

End Date: 9/30/17

Abstract

The project relates to accurate heating and drag predictions are critical to ensure the successful design of entry, descent and landing systems.

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