Tak­ing care of tur­bu­lence

Air intake chamber
Tak­ing care of tur­bu­lence
Credit: DAAD / Lannert.

Taking care of turbulence

What looks like a wind tun­nel is ac­tu­al­ly an air in­take cham­ber. En­gine re­searchers use the 16-me­tre-long, eight me­tre- di­am­e­ter en­clo­sure to re­move tur­bu­lence from air be­fore it reach­es the com­pres­sor of an en­gine dur­ing test­ing. This al­lows them to achieve op­ti­mal and re­peat­able con­di­tions for their ex­per­i­ments.Fans and com­pres­sors are im­por­tant re­search top­ics at the DLR In­sti­tute of Propul­sion Tech­nol­o­gy by rea­son of the great in­flu­ence they ex­ert on the per­for­mance of en­gines and their noise emis­sions. The re­searchers are work­ing on new de­signs for ax­i­al and ra­di­al com­pres­sors, and ver­i­fy­ing their mul­ti­dis­ci­plinary de­vel­op­ment tech­niques us­ing pro­to­types. The mul­ti-shaft com­pres­sor test fa­cil­i­ty, shown in this im­age be­ing pre­pared for a test, is es­sen­tial for this pro­cess.

What looks like a wind tunnel is actually an air intake chamber. Engine researchers use the 16-metre-long, eight metre- diameter enclosure to remove turbulence from air before it reaches the compressor of an engine during testing. This allows them to achieve optimal and repeatable conditions for their experiments.

Fans and compressors are important research topics at the DLR Institute of Propulsion Technology by reason of the great influence they exert on the performance of engines and their noise emissions. The researchers are working on new designs for axial and radial compressors, and verifying their multidisciplinary development techniques using prototypes. The multi-shaft compressor test facility, shown in this image being prepared for a test, is essential for this process.

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