Calibration and data reduction algorithms for non-conventional multi-hole pressure probes

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dc.contributor.advisor Rediniotis , Othon K . en_US
dc.contributor.committeeMember Cizmas , Paul G . en_US
dc.creator Ramakrishnan , Vijay en_US
dc.date.accessioned 2004 -09 -30T01 :41 :02Z
dc.date.accessioned 2014 -02 -18T22 :28 :06Z
dc.date.available 2004 -09 -30T01 :41 :02Z
dc.date.available 2014 -02 -18T22 :28 :06Z
dc.date.created 2003 -05 en_US
dc.date.issued 2004 -09 -30T01 :41 :02Z
dc.identifier.uri http : / /hdl .handle .net /1969 .1 /52
dc.description.abstract This thesis presents the development of calibration and data -reduction algorithms for non -conventional multi -hole pressure probes . The algorithms that have been developed for conventional 5 - and 7 -hole probes are not optimal for probes with port arrangements (on the probe tip ) that are non -conventional . Conventional algorithms utilize the axisymmetry of the port distribution pattern to define the non -dimensional pressure coefficients . These coefficients are typically defined specifically for these patterns , but fail to correctly represent different patterns of port arrangements , such as patterns without axisymmetry or regularity . The algorithms introduced herein can handle any pattern of port arrangement , from axisymmetric and regular to random . Moreover , they eliminate the need to separate the measurement domain of a probe to "low -angle" and "high -angle" regimes , typical in conventional 5 - and 7 -hole -probe algorithms that require two different sets of pressure coefficient definitions and procedures . Additionally , the algorithms have been formulated such that they facilitate redundancy implementations , especially in applications where such redundancy is important , such as air -data systems . The developed algorithms are first applied to a non -conventional probe , a nearly omni -directional 18 -hole probe , and demonstrate very high flow measurement accuracy . Subsequently , the algorithms were applied to a new 12 -hole , nearly omni -directional , flow velocity measurement probe capable of measuring reversed flows . The new 12 -hole design offers several advantages over a previously developed , 18 -hole , nearly omni -directional probe . The probe is optimized in the sense that , regardless of the flow direction , it allows calculation of the 4 unknown flow quantities , i .e . the two flow angles , the velocity magnitude and the static pressure , with the minimum necessary number of holes /ports on the probe tip . This probe also has a non -conventional arrangement of its pressure ports and therefore the new calibration and data -reduction algorithms can be effectively employed . With theoretically generated pressure data for the 12 -hole probe , the coefficient definitions are analyzed and found to be well -behaved . en_US
dc.format.extent 1609071 bytes
dc.format.medium electronic en_US
dc.format.mimetype application /pdf
dc.language.iso en _US en_US
dc.publisher Texas A &M University en_US
dc.subject Pressure Probes en_US
dc.title Calibration and data reduction algorithms for non -conventional multi -hole pressure probes en_US
dc.type Book en
dc.type.genre Electronic Thesis en_US
dc.type.material text en_US
dc.format.digitalOrigin born digital en_US

Citation

Calibration and data reduction algorithms for non-conventional multi-hole pressure probes. Available electronically from http : / /hdl .handle .net /1969 .1 /52 .

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