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The effects of varying diameter on coaxial propellers for the propulsion of multirotor systems

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TitleInfo
Title
The effects of varying diameter on coaxial propellers for the propulsion of multirotor systems
Name (type = personal)
NamePart (type = family)
Ostar-Exel
NamePart (type = given)
Laura
NamePart (type = date)
1992-
DisplayForm
Laura Ostar-Exel
Role
RoleTerm (authority = RULIB)
author
Name (type = personal)
NamePart (type = family)
Diez
NamePart (type = given)
F. Javier
DisplayForm
F. Javier Diez
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
chair
Name (type = personal)
NamePart (type = family)
Shan
NamePart (type = given)
Jerry
DisplayForm
Jerry Shan
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = personal)
NamePart (type = family)
Bilgen
NamePart (type = given)
Onur
DisplayForm
Onur Bilgen
Affiliation
Advisory Committee
Role
RoleTerm (authority = RULIB)
internal member
Name (type = corporate)
NamePart
Rutgers University
Role
RoleTerm (authority = RULIB)
degree grantor
Name (type = corporate)
NamePart
School of Graduate Studies
Role
RoleTerm (authority = RULIB)
school
TypeOfResource
Text
Genre (authority = marcgt)
theses
OriginInfo
DateCreated (qualifier = exact)
2019
DateOther (qualifier = exact); (type = degree)
2019-01
CopyrightDate (encoding = w3cdtf)
2019
Place
PlaceTerm (type = code)
xx
Language
LanguageTerm (authority = ISO639-2b); (type = code)
eng
Abstract (type = abstract)
Rotorcraft are in use today as both unmanned and manned aerial vehicles, and are limited in performance by the size constraints on their propellers. In order to expand the nature and scope of missions that unmanned aerial vehicles can be used for, said performance limitations must be mitigated. As the payload requirements for rotorcraft increase, the thrust necessary to operate must also increase, which can be achieved to a certain extent by increasing the size of the propellers on the craft. However, large propellers increase the footprint of unmanned aerial vehicles, limiting their mobility in flight, their options for landing sites, and their transportability. When the use of increasingly larger propellers on the aircraft is no longer viable, an increase in the number of propellers is the next logical step. To increase the number of propellers without increasing the footprint of the craft, the propellers can be stacked so that they rotate coaxially. This investigation explains the reduction in the performance of downstream propellers in comparison to upstream and to single propeller arrangements. The loss of thrust is due to the wake of the upstream propeller applying a counter thrust to the downstream propeller. This study investigates methods to mitigate these thrust losses by alternating rotational direction, increasing separation distance, changing the balance of electrical power input, and varying the diameter of the propellers. Experiments were performed to compare the thrust output of contrarotating propellers and corotating propellers. Separation distance between the propellers was increased from the minimum possible up to a single diameter length and the effect on output was measured. The balance of electrical power input between the propellers was varied to determine which propeller should be powered first. The thrust and efficiency of systems of propellers with constant and increasing diameter are experimentally measured and compared to single propellers. Therefore, systems of propellers of increasing diameter may be viable for unmanned aerial vehicles whose mission requirements include maneuverability, transportability, and greater payload while accepting shorter fight times.
Subject (authority = RUETD)
Topic
Mechanical and Aerospace Engineering
Subject (authority = ETD-LCSH)
Topic
Propellers, Aerial--Design and construction
RelatedItem (type = host)
TitleInfo
Title
Rutgers University Electronic Theses and Dissertations
Identifier (type = RULIB)
ETD
Identifier
ETD_9422
PhysicalDescription
Form (authority = gmd)
electronic resource
InternetMediaType
application/pdf
InternetMediaType
text/xml
Extent
1 online resource (59 pages) : illustrations
Note (type = degree)
M.S.
Note (type = bibliography)
Includes bibliographical references
Note (type = statement of responsibility)
by Laura Ostar-Exel
RelatedItem (type = host)
TitleInfo
Title
School of Graduate Studies Electronic Theses and Dissertations
Identifier (type = local)
rucore10001600001
Location
PhysicalLocation (authority = marcorg); (displayLabel = Rutgers, The State University of New Jersey)
NjNbRU
Identifier (type = doi)
doi:10.7282/t3-g3t6-2380
Genre (authority = ExL-Esploro)
ETD graduate
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Rights

RightsDeclaration (ID = rulibRdec0006)
The author owns the copyright to this work.
RightsHolder (type = personal)
Name
FamilyName
Ostar-Exel
GivenName
Laura
Role
Copyright Holder
RightsEvent
Type
Permission or license
DateTime (encoding = w3cdtf); (qualifier = exact); (point = start)
2018-12-11 22:29:45
AssociatedEntity
Name
Laura Ostar-Exel
Role
Copyright holder
Affiliation
Rutgers University. School of Graduate Studies
AssociatedObject
Type
License
Name
Author Agreement License
Detail
I hereby grant to the Rutgers University Libraries and to my school the non-exclusive right to archive, reproduce and distribute my thesis or dissertation, in whole or in part, and/or my abstract, in whole or in part, in and from an electronic format, subject to the release date subsequently stipulated in this submittal form and approved by my school. I represent and stipulate that the thesis or dissertation and its abstract are my original work, that they do not infringe or violate any rights of others, and that I make these grants as the sole owner of the rights to my thesis or dissertation and its abstract. I represent that I have obtained written permissions, when necessary, from the owner(s) of each third party copyrighted matter to be included in my thesis or dissertation and will supply copies of such upon request by my school. I acknowledge that RU ETD and my school will not distribute my thesis or dissertation or its abstract if, in their reasonable judgment, they believe all such rights have not been secured. I acknowledge that I retain ownership rights to the copyright of my work. I also retain the right to use all or part of this thesis or dissertation in future works, such as articles or books.
Copyright
Status
Copyright protected
Availability
Status
Open
Reason
Permission or license
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Technical

RULTechMD (ID = TECHNICAL1)
ContentModel
ETD
OperatingSystem (VERSION = 5.1)
windows xp
DateCreated (point = end); (encoding = w3cdtf); (qualifier = exact)
2019-03-19T08:55:34
CreatingApplication
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1.4
ApplicationName
Skia/PDF m73
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