Searched for: author%3A%22Gangoli+Rao%2C+A.%22
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Tambe, S.S. (author), Schrijer, F.F.J. (author), Veldhuis, L.L.M. (author), Gangoli Rao, A. (author)
This work shows the behaviour of an unstable boundary-layer on rotating cones in high-speed flow conditions: high Reynolds number Rel > 106, low rotational speed ratio S < 1–1.5, and inflow Mach number M = 0.5. These conditions are most-commonly encountered on rotating aero-engine-nose-cones of transonic cruise aircraft. Although it has...
journal article 2022
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Baskaran, Pradeep (author), della Corte, B. (author), van Sluis, M. (author), Gangoli Rao, A. (author)
Boundary-layer ingestion (BLI) has been proposed as one of the novel airframe–engine integration technologies to reduce aircraft fuel consumption. The current numerical analysis involves the evaluation of the effect of fuselage design on the power consumption of a boundary-layer ingesting propulsor modeled as an actuator volume without...
journal article 2022
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van Sluis, M. (author), Nasrollahi, S. (author), Gangoli Rao, A. (author), Eitelberg, G. (author)
The AeroCity is a new form of transportation concept that has been developed to provide high-speed ground transportation at a much lower cost than the existing high-speed railway. Utilizing the Wing-in-Ground (WIG) effect, the AeroCity vehicle does not require complex infrastructures like other contemporary concepts, such as the Hyperloop or...
journal article 2022
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Tambe, S.S. (author), Schrijer, F.F.J. (author), Gangoli Rao, A. (author), Veldhuis, L.L.M. (author)
Centrifugal instability of the boundary layer is known to induce spiral vortices over a rotating slender cone that is facing an axial inflow. This paper shows how a deviation from the symmetry of such axial inflow affects the boundary layer instability over a rotating slender cone with half-angle. The spiral vortices are experimentally...
journal article 2021
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Augusto Viviani Perpignan, A.A.V. (author), Tomasello, S.G. (author), Gangoli Rao, A. (author)
Future energy and transport scenarios will still rely on gas turbines for energy conversion and propulsion. Gas turbines will play a major role in energy transition and therefore gas turbine performance should be improved, and their pollutant emissions decreased. Consequently, designers must have accurate performance and emission prediction...
journal article 2021
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della Corte, B. (author), van Sluis, M. (author), Veldhuis, L.L.M. (author), Gangoli Rao, A. (author)
Boundary Layer Ingestion (BLI) is a promising propulsion integration technology capable of enhancing aircraft propulsive efficiency. The Propulsive Fuselage Concept (PFC), a tube-and-wing configuration with an aft-fuselage-mounted BLI propulsor, is particularly suited for BLI. Although extensively studied on a system level, the aerodynamic...
journal article 2021
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della Corte, B. (author), van Sluis, M. (author), Gangoli Rao, A. (author), Veldhuis, L.L.M. (author)
View Video Presentation: https://doi-org.tudelft.idm.oclc.org/10.2514/6.2021-2467.vid<br/><br/>Boundary Layer Ingestion (BLI) is a technology that promises fuel consumption benefits for future civil aircraft. However, it introduces detrimental aerodynamic interactions between the propulsor and the airframe. In particular, the inflow to the BLI...
conference paper 2021
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Grewe, V. (author), Gangoli Rao, A. (author), Grönstedt, Tomas (author), Xisto, Carlos (author), Linke, Florian (author), Melkert, J.A. (author), Middel, Jan (author), Ohlenforst, Barbara (author), Blakey, Simon (author)
Aviation is an important contributor to the global economy, satisfying society’s mobility needs. It contributes to climate change through CO<sub>2</sub> and non-CO<sub>2</sub> effects, including contrail-cirrus and ozone formation. There is currently significant interest in policies, regulations and research aiming to reduce aviation’s...
journal article 2021
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Yin, F. (author), Gangoli Rao, A. (author)
Society is going through transformations at a rate that is unprecedented in human history. One such transformation is the energy transition, which will affect almost every facet of our society. Gas turbine engines are state of the art machines, a backbone of modern society, and used in various applications, right from power generation to...
review 2020
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van Holsteijn, M.R. (author), Gangoli Rao, A. (author), Yin, F. (author)
With the growing pressure to reduce the environmental footprint of aviation, new and efficient propulsion systems must be investigated. The current research looks at the operating characteristics of a turbofan engine in a parallel hybrid-electric propulsion system. Electric motors are used to supply power in the most demanding take-off and...
conference paper 2020
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Gangoli Rao, A. (author), Yin, F. (author), Werij, H.G.C. (author)
Aviation is the backbone of our modern society. In 2019, around 4.5 billion passengers travelled through the air. However, at the same time, aviation was also responsible for around 5% of anthropogenic causes of global warming. The impact of the COVID-19 pandemic on the aviation sector in the short term is clearly very high, but the long-term...
review 2020
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Gangoli Rao, A. (author), Yin, F. (author)
Aviation is the backbone of our modern society. At present, around 4.5 Billion passengers travel through the air every year and aviation is responsible for around 5 % of anthropogenic causes of Global Warming (Lee et al, 2009). With the increase in global GDP, the number of travellers is expected to increase to 7.5 Billion by 2037 and to around...
abstract 2020
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Tambe, S.S. (author), Schrijer, F.F.J. (author), Gangoli Rao, A. (author), Veldhuis, L.L.M. (author)
Abstract: Infrared thermography is applied to measure the spiral vortices in the boundary layer over a rotating cone under axial inflow. The data sets are analysed using proper orthogonal decomposition (POD). A criterion based on the signal-to-noise ratio is defined for the selection of relevant POD modes, such that a low-order reconstruction...
journal article 2019
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Tambe, S.S. (author), Schrijer, F.F.J. (author), Gangoli Rao, A. (author), Veldhuis, L.L.M. (author)
Boundary layer instabilities and the formation of coherent spiral vortices over a rotating cone and ellipsoid are studied experimentally. It is found that under a non-axial inflow, the breaking of symmetry in the flow field significantly disturbs the coherence and delays the formation of spiral vortices to higher local Reynolds numbers (Re_l)...
conference paper 2019
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Augusto Viviani Perpignan, A.A.V. (author), Sampat, R.P. (author), Gangoli Rao, A. (author)
The Flameless Combustion (FC) regime has been pointed out as a promising combustion technique to lower the emissions of nitrogen oxides (NOx) while maintaining low CO and soot emissions, as well as high efficiencies. However, its accurate modeling remains a challenge. The prediction of pollutant species, especially NOx, is affected by the...
journal article 2019
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Gangoli Rao, A. (author), van den Oudenalder, F. S.C. (author), Klein, S.A. (author)
The energy scenario is currently undergoing a rapid transition in the pursuit of increasing the share of renewable energy sources in order to reduce the global anthropogenic CO2 emission. However, since several of the renewable energy sources are intermittent in nature, like wind and solar, this intermittency gives rise to several problems in...
journal article 2019
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Augusto Viviani Perpignan, A.A.V. (author), Talboom, M.G. (author), Levy, Yeshayahou (author), Gangoli Rao, A. (author)
Since its discovery, the flameless combustion (FC) regime has been a promising alternative to reduce pollutant emissions of gas turbine engines. This combustion mode is characterized by well-distributed reaction zones, which potentially decreases temperature gradients, acoustic oscillations, and NO<sub>x</sub> emissions. Its attainment within...
journal article 2018
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Augusto Viviani Perpignan, A.A.V. (author), Tomasello, S.G. (author), Gangoli Rao, A. (author)
abstract 2018
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Mahulikar, SP (author), Gangoli Rao, A. (author), Kolhe, Pankaj S. (author)
Low flight altitude missions are a threat due to the combat aircraft’s Infrared (IR) Signature Level (IRSL) as seen by ground-based IR-seeker. The bands in which, the aircraft is susceptible to a typical IR-guided Surface-to-Air Missile are 3-5 m and 8-12 m. The rear fuselage skin contributes substantially to the overall aircraft IRSL...
conference paper 2018
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Gangoli Rao, A. (author)
abstract 2018
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