Design and Integration of a Low Observable Intake for the MULDICON Platform

A Novel Test Bed for the Aeroacoustic Investigation of UCAV Configurations with Highly Integrated Propulsion Systems

“…The original MULDICON UCAV planform design, which origins from NATO AVT-251 [6], was adopted and modified to allow, from an experimental standpoint, the integration of an intake and an exhaust channel, as depicted in Figure 3. The original planform remained untouched while the centerbody design by FOI (Swedish Defense Research Agency) was selected [3]. This design has a thicker centerbody, leaving more room for the intake and exhaust channels integration.…”

“…Figure 7), and thus for subsonic test conditions up to a Mach number of 0.2. The centerbody and intake are based on a design by FOI [3], while the nozzle is a DLR-design. The complex curved intake and nozzle geometries were designed with radar signature minimization in mind, with no a priori consideration of the acoustic radiation problem.…”

“…A highly relevant technical question, in term of the acoustic signature of UCAVs, concerns the engine integration into the airframe. The actual position of the engine relative to an aircraft's planform is known to directly impact its acoustic signature [2,3,4,5]. Moreover, for jet-propelled vehicles, the specific characteristics of the exhaust jet also have a strong impact on the vehicle's acoustic signature, in terms of absolute noise emission levels and directivity [5].…”

Design studies and multi-disciplinary assessment of agile and highly swept flying wing configurations

“…Due to limitations in time and resources, their final results could not be incorporated directly into the overall aircraft concept; however, their demands were considered as boundary conditions where possible. More Details on engine integration work for MULDICON can be found in [51][52][53][54].…”

Numerical investigation of the unsteady distortion for an S-duct intake with mechanical vortex generators

“…Computational Fluid Dynamics (CFD) is used to support the development of complex intakes. Today, steady state computations represent a valuable tool for the optimization of intake design with (Jirásek, 2006;Yi et al, 2012) and without (Edefur and Tormalm, 2018;Jirasek et al, 2018) flow control devices at a relatively low computational cost. However, these models have proven to be inadequate for the prediction of massively separated flows fields where the dynamics of large scale turbulent structures play a central role in the flow behaviour.…”