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Lyapunov spectrum of the separated flow around the NACA 0012 airfoil and its dependence on numerical discretization
Published 2020“…The two-dimensional chaotic flow around the NACA 0012 airfoil at a low Reynolds number and large angle of attack is considered to that end. …”
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A low order model for vertical axis wind turbines
Published 2010“…The model uses a 2D hybrid dynamic vortex and blade element momentum approach. Each airfoil is modeled as a single vortex of time varying strength with an analytical model for the influence of the shed vorticity. …”
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A method of sequential log-convex programming for engineering design
Published 2022“…In these cases, SLCP shows up to a 77% reduction in number of iterations compared to SQP, and an 11% reduction compared to LSQP. The airfoil analysis code XFOIL is integrated into one of the case studies to show how SLCP can be used to evolve the fidelity of design problems that have initially been modeled as GP compatible. …”
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Area Schedule Based Design of High-Pressure Recovery Radial Diffusion Systems
Published 2018“…To address the shortcomings of the commonly used channel diffuser and airfoil cascade design perspectives, a streamtube based area schedule is adopted paying special attention to the diffuser entry region. …”
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Lyapunov spectrum of scale-resolving turbulent simulations. Application to chaotic adjoints
Published 2018“…We present an investigation of the Lyapunov spectrum of the chaotic, separated flow around the NACA 0012 airfoil at Reynolds number 2,400. The impact of the numerical discretization on the spectrum is investigated through time and space refinement studies. …”
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Area-Schedule Based Design of High Pressure Recovery Radial Diffusion Systems
Published 2018“…To address the shortcomings of the commonly used channel diffuser and airfoil cascade design perspectives, a streamtube based area-schedule is adopted paying special attention to the diffuser entry region. …”
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Development of an In-Flight-Deployable Micro-UAV
Published 2018“…The small dimensions and low Reynolds number of the wings required manufacturing constraints to be considered in the airfoil design to prevent laminar separation which impacted controllability. …”
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The Role of Impeller Outflow Conditions on the Performance of Vaned Diffusers
Published 2018“…The test article is a pressure ratio 5 turbocharger compressor with an airfoil vaned diffuser. The swirling flow rig is able to generate rotor outflow conditions representative of the compressor except for the periodic pitchwise unsteadiness, and fits a 0.86 scale diffuser and volute. …”
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The Role of Impeller Outflow Conditions on the Performance of Vaned Diffusers
Published 2018“…The test article is a pressure ratio 5 turbocharger compressor with an airfoil vaned diffuser. The swirling flow rig is able to generate rotor outflow conditions representative of the compressor except for the periodic pitchwise unsteadiness and fits a 0.86 scale diffuser and volute. …”
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Data fitting with signomial programming compatible difference of convex functions
Published 2022“…Examples presented here include simple test cases in 1D and 2D, and a fit to the performance data of the NACA 24xx family of airfoils. In each case, RMS error is driven to less than 1%.…”
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Design and Performance of a Flexible Aircraft Manufacturing Platform
Published 2017“…To design common molds, airfoils and planform taper angle must be designed across multiple vehicles’ performance spaces. …”
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