Dr Deepak Akiwate's Outputs (16)

Reducing Tonal Noise of Contra-Rotating Unmanned Aerial System Rotors via Blade Rake Angle Adjustment (2025)
Journal Article

This paper investigates the effect of blade rake angle on the tonal noise produced by contra-rotating rotor systems suitable for use on small multi-rotor unmanned aerial systems (UAS). This investigation utilises semi-analytical, numerical, and exper... Read More about Reducing Tonal Noise of Contra-Rotating Unmanned Aerial System Rotors via Blade Rake Angle Adjustment.

Aerodynamics and Acoustics of Asymmetric Propellers With Uneven Blade Spacing (2024)
Presentation / Conference Contribution

The presented work aims to establish whether asymmetric propellers with uneven blade spacing offer any acoustic benefits over a conventional propeller with identical blade geometry. An experimental investigation was conducted to measure static thrust... Read More about Aerodynamics and Acoustics of Asymmetric Propellers With Uneven Blade Spacing.

Aeroacoustics of In-Flight Propeller-Wing in Pusher Configuration (2024)
Presentation / Conference Contribution

In this study, we investigate the noise produced by a propeller installed in a pusher configuration in close proximity to a wing. Experiments are conducted in a state-of-the-art anechoic wind tunnel to observe the impact of both static and in-flight... Read More about Aeroacoustics of In-Flight Propeller-Wing in Pusher Configuration.

On the balance between the tonal and broadband noise of isolated propellers (2024)
Journal Article
Akiwate, D. C., Joseph, P., Parry, A., & Paruchuri, C. (in press). On the balance between the tonal and broadband noise of isolated propellers. International Journal of Aeroacoustics, https://doi.org/10.1177/1475472X231225631

Aeroacoustics source mechanisms of fixed-wing VTOL configuration (2023)
Presentation / Conference Contribution

This paper is a predominantly experimental investigation into the noise generation mechanisms of Fixed-wing Vertical Take-Off and Landing (VTOL) propeller – wing configurations. These new aircraft combine the benefits of being able to land vertically... Read More about Aeroacoustics source mechanisms of fixed-wing VTOL configuration.

Investigation into the mechanisms of propeller-wing interaction noise (2022)
Presentation / Conference Contribution

This paper presents the preliminary experimental investigation of the dominant noise sources from the propeller-wing configuration at hover conditions. A parametric study is performed to investigate the sensitivity of the radiated noise to the axial... Read More about Investigation into the mechanisms of propeller-wing interaction noise.

Investigation into the mechanisms of propeller-wing interaction noise (2022)
Presentation / Conference Contribution

This paper presents the preliminary experimental investigation of the dominant noise sources from the propeller-wing configuration at hover conditions. A parametric study is performed to investigate the sensitivity of the radiated noise to the axial... Read More about Investigation into the mechanisms of propeller-wing interaction noise.

On the balance between the tonal and broadband noise of uninstalled propellers (2021)
Presentation / Conference Contribution

This paper provides a preliminary theoretical investigation of the balance between rotor alone tonal and broadband noise. First, using well-published theory, the different source mechanisms for tonal and broadband noise are discussed and presented. T... Read More about On the balance between the tonal and broadband noise of uninstalled propellers.

On the noise generation mechanisms of overlapping propellers (2021)
Presentation / Conference Contribution

Overlapping propeller systems are currently used on some urban flight vehicles and will become increasingly common in future electric propulsion, since they provide one of the most compact platform volumes per unit thrust. This paper presents the res... Read More about On the noise generation mechanisms of overlapping propellers.

On the noise generation mechanisms of overlapping propellers (2021)
Presentation / Conference Contribution

Overlapping propeller systems are currently used on some urban flight vehicles and will become increasingly common in future electric propulsion, since they provide one of the most compact platform volumes per unit thrust. This paper presents the r... Read More about On the noise generation mechanisms of overlapping propellers.

Acoustic properties of additive manufactured porous material (2020)
Presentation / Conference Contribution

Acoustic porous materials are extensively used in many engineering applications like building, automobile, aviation, and marine. The health risk factor and environmental claims, associated with traditional materials such as glass wool, mineral fibers... Read More about Acoustic properties of additive manufactured porous material.

Acoustic characterization of additive manufactured layered porous materials (2019)
Presentation / Conference Contribution

Acoustic characterization of additive manufactured perforated panel backed by honeycomb structure with circular and non-circular perforations (2019)
Journal Article

This paper studies the acoustic properties of an additive manufactured micro-perforated panel backed by a periodic honeycomb structure. Extrusion-based Fused Filament Fabrication (FFF) technique of Additive Manufacturing (AM) is used to fabricate the... Read More about Acoustic characterization of additive manufactured perforated panel backed by honeycomb structure with circular and non-circular perforations.

Acoustic measurement of additive manufactured concentric tube reverse flow resonators (2018)
Journal Article

This study investigates acoustic properties of additive manufactured (AM) concentric tube reverse flow (RF) resonators where acoustic attenuation with smaller sample length is achieved by increasing effective travel length of acoustic waves within a... Read More about Acoustic measurement of additive manufactured concentric tube reverse flow resonators.

Acoustic characterization of additive manufactured micro-perforated panel backed by honeycomb structure (2018)
Presentation / Conference Contribution

Acoustic properties of additive manufactured narrow tube periodic structures (2018)
Journal Article

Quarter tube periodic resonators are used to attenuate the acoustic energy of discrete frequencies wherein their sizes can vary from narrow to large. This paper reports acoustical properties of additive manufactured, narrow tube, single and multi-per... Read More about Acoustic properties of additive manufactured narrow tube periodic structures.