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Computational Study of a High-Performance Submerged Inlet with Bleeding Vortex
Journal of Aircraft, 2012Previous investigations on the submerged inlets show that the counter-rotating vortex pair originated from the side edge is helpful to inhale the external flow into the duct but increases the mixing loss of the inlet. To improve the performance of this type of inlet, a flow-control method based on a bleeding vortex is brought forward in this paper that
Dai-Shu Cheng +3 more
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The Effect of Discrete Blowing Jets on Submerged Inlet Flow Uniformity
International Journal of Flow Control, 2011An experimental flow control study was performed on a submerged inlet, with a geometry documented by NACA, to determine whether discrete blowing would offset the boundary layer deficit created at the throat and, subsequently, the engine face. Measurements of the uniformity of the streamwise velocity, secondary flow patterns, and turbulence statistics ...
T. Reynolds, M. Reeder
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Effects of inlet shape on the performance of a submerged cargo pump
Journal of Fluid Machinery, 2007In this paper, effects of inlet shape on the performance of a submerged cargo pump were numerically studied using a commercial CFD code CFX. The inlet shape, especially the gap between pump and suction well, is an important parameter in a point of view of performances of submerged cargo pump due to its effects on the residual and also hydraulic ...
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Three-dimensional flow characteristics around permeable submerged breakwaters with open inlet
Ocean Engineering, 2012Abstract We analyzed the three dimensional hydrodynamic characteristics around fully submerged dual breakwaters with a sandy beach using a newly developed three-dimensional numerical scheme. Using our model which considers wave-structure–sandy seabed interactions in a 3-D wave field, we were able to determine the direct effects of the porous media of
Dong-Soo Hur, Woo-Dong Lee
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Design Space Exploration of Submerged Inlet Capturing Interaction Between Design Parameters
28th AIAA Applied Aerodynamics Conference, 2010Submerged inlets have been of interest to the aeronautical community for years due to the high on-design (cruise) performance they may potentially provide. Submerged inlets require less weight and experience lower drag than other inlet topologies. Engineers have been slow to adopt the submerged inlet topology for their designs because of the inherent ...
Farooq Akram +2 more
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Submerged Inlet Performance Enhancement Using a Unique Bump-Shaped Vortex Generator
Journal of Propulsion and Power, 2016By combining the guiding effects of the windward bump with the sweeping effects of the vortex pair on the fuselage boundary layer, a unique flow control device featuring low aerodynamic drag is developed for submerged inlets. Wind-tunnel tests are conducted over wide operating conditions to determine the performance improvement by the bump-shaped ...
Shu Sun, Hui-Jun Tan, Chen-Xi Wang
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Characteristics of Swirl Angle in Pump Intake Flow Near the Minimum Inlet Submergence
Volume 3B: Fluid Applications and Systems, 2019Abstract Swirling flow in pump sump intake has been the subject of discussion for the past decades due to the detrimental effects brought about by its existence. Among the effects of swirling flow are reduced pump efficiency, cavitation, excessive vibration and load imbalance at the pump impeller which are caused by hydraulic problems ...
Tajul Ariffin Norizan +3 more
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Analyses of Minimum Submergence and Air Discharge in Vertical Shafts with Different Inlets
2009Intakes and dropshafts conduct water from the inlet towards a vertical shaft connecting to a tunnel, which has the function of discharging to a hydroelectric power plant, irrigation or water supply system. A problem to the hydraulic engineer is to design an intake taking into account the prevention of vortex formation.
Laura Maria Canno Ferreira Fais +1 more
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Computational Study of Submerged Air Inlet Performance Improvement Using Vortex Generators
Journal of Aircraft, 2007In this computational work, the influence of a delta wing vortex generator on the boundary layer that develops upstream of a submerged air intake is studied. The state-of-the-art analysis and design of these intakes is discussed in detail. The flow in a conventional NACA inlet is analyzed numerically and its results are considered as a reference for ...
César Celis Pérez +4 more
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Flight Test and Refinement of a Nacelle Ventilation Inlet Partially Submerged in Boundary Layer
Volume 1: Aircraft Engine; Marine; Turbomachinery; Microturbines and Small Turbomachinery, 2001Efforts to develop, test, and refine a nacelle ventilation inlet for the F-16 Fighting Falcon are presented in this work. The nacelle inlet was developed to support retrofit of existing F-16 aircraft with an ejector nozzle. The F-16 is equipped with a ventilated nacelle that inhibits ignition sources and accumulation of flammable vapors ...
Brian F. Lundy +2 more
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