Výsledky vyhledávání - "D. I. A. Poll"

On the relationship between non-optimum operations and fuel requirement for large civil transport aircraft, with reference to environmental impact and contrail avoidance strategy

Autor: D. I. A. Poll

Publikováno v: The Aeronautical Journal. 122:1827-1870

The general problem of determining cruise fuel burn is addressed by considering the variation of the product of engine overall efficiency and airframe lift-to-drag ratio, (ηoL/D), with Mach number and lift coefficient. This quantity is the aerotherm

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::350b2a56ba1e99d5c3c786d7a919802c
https://doi.org/10.1017/aer.2018.121

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An estimation method for the fuel burn and other performance characteristics of civil transport aircraft in the cruise. Part 1: fundamental quantities and governing relations for a general atmosphere

Autor: D. I. A. Poll, U. Schumann

This paper is one of a series addressing the need for simple, yet accurate, methods for the estimation of cruise fuel burn and other important aircraft performance parameters. Here, a previously published, constant Reynolds number model for turbofan-

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d0be9aa45cc2cb26e6ffa2ed8d3472a0
https://elib.dlr.de/135592/

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21st-Century civil aviation: Is it on course or is it over-confident and complacent? – thoughts on the conundrum of aviation and the environment

Autor: D. I. A. Poll

Publikováno v: The Aeronautical Journal. 121:115-140

Aviation brings great commercial and social benefits and, as the global economy develops, the demand for air transport is expected to grow. However, aviation also contributes to climate change and there is increasing international pressure to limit m

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::aa421650e2e20c8e46716409d215c735
https://doi.org/10.1017/aer.2016.140

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On the application of light weight materials to improve aircraft fuel burn – reduce weight or improve aerodynamic efficiency?

Autor: D. I. A. Poll

Publikováno v: The Aeronautical Journal. 118:903-934

An analysis, based upon exact relations and previously published approximate relations, is presented. It describes the connection between changes in aircraft weight and changes in the energy to revenue work ratio (ETRW), which, for a given aircraft o

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8c45be0dfe5d1edb05b09ba770ab7ce5
https://doi.org/10.1017/s0001924000009611

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Modelling of Coaxial Jet Efflux Mixing using LES

Autor: Michael P. Kirkpatrick, Jenny C. Holt, K.K.J. Ranga Dinesh, A. M. Savill, D. I. A. Poll, Kevin P. Garry

Publikováno v: International Journal of Fluid Mechanics Research. 39:20-39

A detailed study has been performed to investigate passive scalar mixing of turbulent co-flowing jets in their initial exhaust development region, as a complement to separate experimental studies, to provide better defined initial conditions for subs

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::39b5cb558920f09ea344f9c9a4255a5b
https://doi.org/10.1615/interjfluidmechres.v39.i1.20

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A first order method for the determination of the leading mass characteristics of civil transport aircraft

Autor: D. I. A. Poll

Publikováno v: The Aeronautical Journal. 115:257-272

Simple, approximate relations are developed that allow rapid, yet accurate, estimates of the principal mass characteristics of modern civil transport aircraft. The method is based upon an ‘aircraft mass hypothesis’ combined with data taken from T

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b39359519b8c654236eb1ede2877a39a
https://doi.org/10.1017/s000192400000573x

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On the effect of stage length on the efficiency of air transport

Autor: D. I. A. Poll

Publikováno v: The Aeronautical Journal. 115:273-283

It is generally recognised that fuel can be saved on long haul routes if non-stop flights are broken down into a number of short stages. As fuel costs rise, these savings may eventually become economically attractive to airlines. ‘Staging’ may al

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ecc8894f9204d77c629b9fb5f542e83c
https://doi.org/10.1017/s0001924000005741

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The optimum aeroplane and beyond

Autor: D. I. A. Poll

Publikováno v: The Aeronautical Journal. 113:151-164

A summary of the ways in which aviation impacts the environment is presented and the ratio of the energy liberated during a flight to the revenue work done (ETRW) is identified as a key indicator in the assessment of environmental impact. Using the �

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::18066ec76b29c9286fe0132e4884e8c5
https://doi.org/10.1017/s000192400001143x

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Aerospace and the environment what contribution can aerodynamics make?

Autor: D. I. A. Poll

Publikováno v: The Aeronautical Journal. 104:321-324

For the past 50 years civil air transport has been dominated by the combination of the gas turbine and the B-47 airframe configuration. Both these machines owed their creation to WW2 and both represented revolutionary concepts at the time. Oyer the y

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e4a5a5685b518b038a5b9ce689e868bc
https://doi.org/10.1017/s0001924000091739

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