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@article{de:2017:10.1103/PhysRevFluids.2.043905,
author = {de, la Cruz JMG and Oxlade, AR and Morrison, JF},
doi = {10.1103/PhysRevFluids.2.043905},
journal = {PHYSICAL REVIEW FLUIDS},
title = {Passive control of base pressure on an axisymmetric blunt body using a perimetric slit},
url = {http://dx.doi.org/10.1103/PhysRevFluids.2.043905},
volume = {2},
year = {2017}
}

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TY  - JOUR
AB  - The effect on the base pressure of a thin slit located at the base edge of a blunt axisymmetric body, communicating an internal cavity with the external flow, is investigated. A parametric study is performed of the effect on base pressure of changes in slit size and cavity depth. The base pressure increases initially with increasing cavity depth, but saturates at a depth which depends on the slit size. The base pressure increases monotonically up to 5% with increasing slit size for the geometries tested. An upper limit of base pressure recovery of 20% is extrapolated from the data. It is observed that the main effect of the slit is to reduce the instantaneous pressure asymmetry, which is linked to the total base pressure in a similar fashion for all the slit sizes. As a second-order effect, for highly asymmetric pressure distributions, the slit produces a base pressure increase not associated with the base pressure asymmetry. The results suggest a global effect of the slit on the wake due to a diametrical flow within the cavity driven by the pressure differences across the slit and regulated by the largest of the pressure drops between the slit and cavity. The slit also reduces the periodic base pressure fluctuations, corresponding mainly to the vortex shedding, and increases the rotational speed of the wake.
AU  - de,la Cruz JMG
AU  - Oxlade,AR
AU  - Morrison,JF
DO  - 10.1103/PhysRevFluids.2.043905
PY  - 2017///
SN  - 2469-990X
TI  - Passive control of base pressure on an axisymmetric blunt body using a perimetric slit
T2  - PHYSICAL REVIEW FLUIDS
UR  - http://dx.doi.org/10.1103/PhysRevFluids.2.043905
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000400249100005&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/48651
VL  - 2
ER  -

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