PhD Studentship: Novel Methods for the Characterisation of Helicopter Aero-acoustics

Closes: 26/06/2024

Supervisors: Dr Ioannis Goulos

For the past 13 years, Cranfield University has been a leader in rotorcraft research, particularly in rotorcraft modelling, performance, aero-mechanics, and aero-acoustics. This PhD project, situated within the Propulsion Engineering Centre, focuses on helicopter aerodynamic and aero-acoustic modelling. The objective is to develop a rapid analysis tool that predicts noise characteristics throughout a helicopter's design and service life. Sponsored by the Engineering and Physical Sciences Research Council (EPSRC) and the UK's Defence and Science Laboratory (DSTL), the research aims to overcome limitations in current aero-acoustic characterization methods for rotary-wing vehicles. 

Traditional approaches rely on experimental or high-fidelity numerical methods, unsuitable for preliminary design due to immaturity and complexity. Neglecting aerodynamic interactions between rotors poses risks and inefficiencies in aircraft development. The project proposes building a Reduced Order Model (ROM) to synthesize noise hemispheres based on vehicle design parameters and operating conditions. A computational framework integrating validated Cranfield tools will be developed, with a focus on capturing Blade Vortex Interaction (BVI) noise. 

State-of-the-art ROM techniques like Proper Orthogonal Decomposition (POD) and dimensionality reduction will analyse noise databases. Surrogate modelling methods such as Gaussian Processes or Artificial Neural Networks will derive analytical approximations. The resulting ROMs will be transferred to DSTL for integration into their predictive models. The project offers funding for conference presentations and a 3-month placement at DSTL. 

Applicants will gain expertise in rotorcraft aerodynamics, aero-acoustics, and engineering data analytics, preparing them for careers in industry or academia. This opportunity provides a unique skill set and understanding of the field.

Entry Requirements

Applicants must have a first-class or upper second-class degree in engineering or a related area. An aerospace background would be a distinct advantage, as would experience on aerodynamics and numerical modelling.

Funding & Sponsorship

To be eligible for this funding, applicants must be a UK national only. Eligibility is also subject to person clearance by DSTL.

Sponsored by the Engineering and Physical Sciences Research Council (EPSRC) and the Defence and Science Laboratory (DSTL), this studentship will provide a bursary of up to £18,622 (tax free) plus fees* for four years.