Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
Thermodynamic analysis of a modified nacelle on a cruise flight to increase fuel economy and performance of the Boeing 737-900 with extended range
Submission Author:
Caio Lucas De Oliveira Santos , MG
Co-Authors:
Caio Lucas De Oliveira Santos, RUBEN ALEXIS MIRANDA CARRILLO, Carlos Eymel Campos Rodriguez
Presenter: Caio Lucas De Oliveira Santos
doi://10.26678/ABCM.COBEM2023.COB2023-2371
Abstract
The present study concerns a redesign of the nacelle's aerodynamic profile for the Boeing 737-900ER to reduce fuel consumption and increase the range factor during cruise flight. For this, an explanation of the technical characteristics of both the approached aircraft and the engine that compose it was made, besides the standardization that regulates the creation of this modified aerodynamic profile: the NACA 6409. Through a Computational Fluid Dynamics simulation it was possible to analyze the performance of the nacelle in each section of the project modified in terms of temperature, flow velocity, pressure and enthalpy of stagnation. In addition, a software was developed in the Python programming language capable of simulating, under the established conditions, the trends in the behavior of the turbofan engine performance parameters and the parameters of the ideal air-standard Brayton cycle analysis. In this sense, one of the characteristics of these trend curves was relevant when describing the thrust specific fuel consumption and the specific thrust, for all bypass values in the used range, as parameters with a practically constant rate of change for the operating range the Mach number on the cruise flight. After all these procedures, through a 21.8% increase in fan output speed when comparing the modified nacelle model with the original one, it was possible to determine other percentage relationships between the results obtained in the two simulations, as an increase of 24.565% in the range factor and a 25.257% decrease in thrust specific fuel consumption. These relationships give qualitative relevance to the results, not only because they are testified through similar literature and works, but mainly by creating an opportunity to study, forecast and develop aircraft projects without the need for a prototype, thus generating savings for companies and accessibility to academics and researchers.
Keywords
Turbofan, Nacelle, Brayton Cycle, thermodynamic, Boeing
