[{"data":1,"prerenderedAt":103},["ShallowReactive",2],{"/resources/papers/aeroacoustics-2020":3},{"id":4,"title":5,"authors":6,"badge":38,"body":40,"cta":19,"date":90,"description":91,"extension":92,"image":93,"links":19,"meta":97,"navigation":98,"path":99,"seo":100,"stem":101,"__hash__":102},"resources/resources/papers/aeroacoustics-2020.md","Drone Acoustics in a WindShaper",[7,12,17,21,24,28,33],{"name":8,"to":9,"avatar":10},"Flavio Noca (PhD)","https://www.linkedin.com/in/flavio-noca",{"src":11},"/img/people/flavio-noca.webp",{"name":13,"to":14,"avatar":15},"Roberto Putzu","https://www.linkedin.com/in/roberto-putzu-19441a2b3",{"src":16},"https://media.licdn.com/dms/image/v2/D4D03AQERVopWCWRGJA/profile-displayphoto-shrink_200_200/profile-displayphoto-shrink_200_200/0/1707229802244?e=1744243200&v=beta&t=A-CAA47bG7xD1zU7oevWvvv8rLbJDekpRZ4w-9RTaPo",{"name":18,"to":19,"avatar":20},"Romain Boulandet",null,{"src":19},{"name":22,"to":19,"avatar":23},"Benjamin Rutschmann",{"src":19},{"name":25,"to":26,"avatar":27},"Thierry Bujard","https://www.linkedin.com/in/thierry-bujard-9492a71b6",{"src":19},{"name":29,"to":30,"avatar":31},"Nicolas Bosson","https://www.linkedin.com/in/nicolas-bosson-52401b12b",{"src":32},"/img/people/nicolas-bosson.webp",{"name":34,"to":35,"avatar":36},"Guillaume Catry","https://www.linkedin.com/in/guillaume-catry",{"src":37},"/img/people/guillaume-catry.webp",{"label":39},"Research Paper",{"type":41,"value":42,"toc":84},"minimark",[43,48,52,55,58,61,65,75],[44,45,47],"h2",{"id":46},"abstract","Abstract",[49,50,51],"p",{},"In the near future, drone usage in inhabited areas is expected to grow exponentially. The inherent noise generated is\none of the concerns for this kind of vehicle.",[49,53,54],{},"Conventional aeroacoustic wind tunnels can be used to investigate uniformflow generated noise. Flyers are generally\nsolidly tethered to a sting in these wind tunnels. However, the interaction of complex environmental flows with the\ndrone fans is expected to generate different harmonic content, especially during unsteady maneuvers. Being able to probe\nthe aeroacoustic signature of a free-flying drone in a realistic urban and wind environment is a necessity, in\nparticular for future certification procedures.",[49,56,57],{},"We have developed a new family of wind tunnels, the “WindShaper” (Noca et al. 2019 Wind and Weather Facility for Testing\nFree-Flying Drones, AIAA Aviation Forum), able to generate complex unsteady flows reproducing environmental gusts and\nshear flows. The WindShaper consists of an array of a large number of fans (wind-pixels) that may be arranged in various\npatterns on demand. It is in some ways a digital wind facility that can be programmed to generate arbitrary winds of\nvariable intensity and direction. Various weather conditions (such as rain, snow, hail, fog etc.) that reflect real\nworld situations can be introduced. Drones are in a free-flight configuration (untethered) as in their natural state.\nThese tests can rate drones according to their capacity in maintaining a proper flight attitude and tackling flight\nperturbations, especially in an urban environment.",[49,59,60],{},"A WindShaper was modified in order to allow aeroacoustic measurements around a free-flying drone in a turbulent flow.\nParticular attention was given to a design that allows the drone aeroacoustic signature to be segregated from the\naeroacoustic signature of the multi-fan facility. Details on the results achieved in this new infrastructure will be\npresented and discussed.",[44,62,64],{"id":63},"full-article","Full Article",[49,66,67,68],{},"Link to the full article as PDF:\n",[69,70,74],"a",{"download":71,"href":72,"target":73},"\nWindShape-Aeroacoustics-Quietdrones-2020.pdf","/articles/2020-Quietdrones-aeroacoustics.pdf","_blank","Download",[76,77,78,79],"div",{},"\n    ",[80,81],"embed",{"src":72,"width":82,"height":83},"100%","500px",{"title":85,"searchDepth":86,"depth":86,"links":87},"",2,[88,89],{"id":46,"depth":86,"text":47},{"id":63,"depth":86,"text":64},"2021-07-28","Aeroacoustic measurements on a free-flying drone in a WindShaper wind tunnel","md",{"src":94,"width":95,"height":96},"/img/papers-header/2020-Quietdrones-aeroacoustics.png",1000,500,{},true,"/resources/papers/aeroacoustics-2020",{"title":5,"description":91},"resources/papers/aeroacoustics-2020","F4KlIffS9QixbYv8f1DLWge49_tHKvCG0Gl2AF-LLP0",1774344909558]