Energy and emission assessments of continuous descent approach

Abstract

Purpose -Continuous descent approach (CDA) is a method, which allows the aircraft flying its individual optimal vertical profile down to runway threshold with engines operating at low-thrust power. The main objective of this paper is to provide less-fuel consumption, less noise and less emission with using CDA procedures instead of conventional procedures. Design/methodology/approach -Conventional and CDA procedures were modelled in the Istanbul terminal area (TMA), which has five entry points. The real speed and the real altitude limitations were maintained on these entry points. System for Assessing Aviation's Global Emissions research results were also used to determine the emission savings. Findings -With CDA procedures, more than 40 kg fuel and 2 min time savings per flight are obtained; furthermore, regarding CO 2 and H 2 O, significant emission savings are also noted. Originality/value -Some of the benefits of CDA procedures are reported for Istanbul TMA by using true flight data.

An assessment of a proposed arrival route model in terminal airspace

“…16 Fuel savings of more than 40 kg and 2 min less flight time per flight were obtained by Turgut et al. 17 at only one airport in Istanbul Airport TMA. Wubben and Busink 11 presented a reduction up to 40% in fuel consumption during descent.…”

Effect of vertical profile inefficiency during descent on fuel burn, emissions and flight time

“…Alcabin et al (11) propose a methodology developed by the Boeing Company to estimate NAS-wide excessive fuel burned due to vertical profile inefficiencies. In addition to the studies that state the methodology and metrics for vertical profile efficiency analysis and its applications, the economic and environmental benefits provided by implementing CCOs and CDOs in terminal area procedures have been investigated by several studies (18)(19)(20)(21)(22)(23)(24)(25)(26) . Shresta et al (20) performed a study for Denver International Airport (DEN) by using radar track data and a Base of Aircraft Data (BADA) model.…”

Optimum Arrival Routes for Flight Efficiency

“…Traffic follows a standard arrival route which enables continuous descent approaches (CDAs) [5]. CDA is defined as a method that the aircraft intercepts glide path from optimal vertical profile down to touchdown with engines operating at low thrust power [6]. The most common benefits of CDA procedures are reducing aircraft noise, fuel burn and emissions [7].…”

“…Another study reporting fuel savings due to CDA was made by Turgut et al (2010). Conventional and CDA procedures were compared by using real flight data for B757 and more than 40 kg fuel and 2 minutes time savings were reported for CDA procedures [6].…”

“…Another study reporting fuel savings due to CDA was made by Turgut et al (2010). Conventional and CDA procedures were compared by using real flight data for B757 and more than 40 kg fuel and 2 minutes time savings were reported for CDA procedures [6]. Robinson (2010) studied on different CDA scenarios and the results of simulation indicated 50 kg -150 kg fuel savings at medium or low traffic density [10].…”