A round liquid jet in a gaseous crossflow (water in air) was observed over a range of conditions in order to investigate the relationship between the final width of the droplet cloud and the momentum ratio between the jet and the crossflow. The motivation for this work is as it relates to aerial fire suppression – that is, the use of aircraft to drop water or other fire retardant products onto ...

A serles of calculatlons are reported for two, expenmentally studled, subsonlc Jet In crossflow geometrles. The parametrlc varlatlon examlned lnvolves the lateral spaclng of a row of Jets. The flrst serles of calculatlons corresponds to a wldely spaced Jet geometry, SID = 4, and the second serles corresponds to closely spaced Jets, SID = 2. The calculatlons are done wlth alternate dlfferenClng ...

Film cooling systems induce a range of complex phenomena associated with the interaction of the coolant jet discharging into a crossflow. The jet-in-crossflow configuration has been extensively studied through experiments and direct/large-eddy numerical simulations. However, most previous simulations consider a laminar crossflow and a transverse jet originating from a fully developed pipe flow ...

Some of the simulation work performed by the computational aerosciences project under the NASA Constellation program is presented. The challenges of simulating the powered flight of the Orion launch abort vehicle for the purposes of building an aerodynamics database are discussed. During an abort this vehicle fires both a four-nozzle abort motor together with an eight-nozzle attitude control mo...

The paper describes DNS of a jet in crossflow at Re=650 and jet-to-crossflow velocity ratio R=3.3. Laminar boundary conditions are employed which makes the present flow configuration advantageous for benchmarking. Use is made of local grid refinement in the region of transition to turbulence. Comparison with Re=325 is carried out for some appropriate quantities. Nine passive scalars, reacting a...

To avoid the complexity of the edge definition by the half width, a new approach to defining the leeward edge of the planar jet in crossflow is introduced in this paper. Particle Image Velocimetry (PIV) experiments were performed to measure different flow regimes within the single jet and the dual jets configurations in crossflow. Based on the experimental data acquired, a series of velocity pr...

Near field liquid structures and penetration of a kerosene jet injected in Mach 2 crossflow were studied experimentally the LAPCAT-II Dual Mode Ramjet Combustor at Onera, using high spatial temporal resolution imaging techniques. The experiments performed this study provide measurements temperature conditions, with as fuel to bring new data these conditions. spray is through single orifice, per...

Large-eddy simulation (LES) and dynamic mode decomposition (DMD) are used to study an underexpanded sonic jet injected into a supersonic crossflow and an overexpanded supersonic jet injected into a subsonic crossflow, where the flow conditions are based on the experiments of Santiago & Dutton (J. Propul. Power, vol. 13 (2), 1997, pp. 264–273) and Beresh et al. (AIAA J., vol. 43, 2005a, pp. 379–...