TY - JOUR
T1 - New principles for dynamic aircraft exergy mapping
AU - Berg, Frederick T. N.
AU - Balchin, Martin J.
AU - Keogh, Patrick S.
PY - 2013/7
Y1 - 2013/7
N2 - As fuel efficiency becomes a greater concern in commercial aircraft design and operation it is important to gain a deeper understanding of energy use throughout an aircraft’s systems. To meet this need, a new methodology is being developed that proposes the use of exergy as a metric for mapping the energy flows throughout an aircraft at any required level of detail over a given flight. Exergy allows direct comparison of differing energy types and clearer interpretation of losses and availability. Time-variant application of exergy to vehicles, however, presents complexities, such as large data volumes, temporary exergy storage, exergy exchange between system and mass, and an inconsistent reference state. A software tool prototype is introduced to allow the management of an aircraft exergy map. To describe its use an unmanned aerial vehicle is evaluated. A turbojet study isolates the reference state problem and illustrates the need to use a moving, aircraft-fixed reference state. However, it is shown that this does not eliminate the problem entirely because of the existence of exergy storages
AB - As fuel efficiency becomes a greater concern in commercial aircraft design and operation it is important to gain a deeper understanding of energy use throughout an aircraft’s systems. To meet this need, a new methodology is being developed that proposes the use of exergy as a metric for mapping the energy flows throughout an aircraft at any required level of detail over a given flight. Exergy allows direct comparison of differing energy types and clearer interpretation of losses and availability. Time-variant application of exergy to vehicles, however, presents complexities, such as large data volumes, temporary exergy storage, exergy exchange between system and mass, and an inconsistent reference state. A software tool prototype is introduced to allow the management of an aircraft exergy map. To describe its use an unmanned aerial vehicle is evaluated. A turbojet study isolates the reference state problem and illustrates the need to use a moving, aircraft-fixed reference state. However, it is shown that this does not eliminate the problem entirely because of the existence of exergy storages
UR - http://www.scopus.com/inward/record.url?scp=84883266201&partnerID=8YFLogxK
UR - http://dx.doi.org/10.2514/1.C032040
U2 - 10.2514/1.C032040
DO - 10.2514/1.C032040
M3 - Article
SN - 0021-8669
VL - 50
SP - 1088
EP - 1098
JO - AIAA Journal of Aircraft
JF - AIAA Journal of Aircraft
IS - 4
ER -