Multiple objective optimization of the power unit for a very light jet

作者：Majka Andrzej^*

来源：Aircraft Engineering and Aerospace Technology, 2014, 86(3): 234-241.

DOI：10.1108/AEAT-01-2013-0010

• Air transport
• Aircraft design
• Engine choice
• Multiobjective optimization
• Very light jet

Purpose - The purpose of this paper is to propose a solution of the engine bypass ratio choice problem of a very light jet (VLJ) class aircraft using the multiple objective optimization (MOO) method.
Design/methodology/approach - The work focuses on the choice of one of the most essential parameters of the jet engine, that is its bypass ratio. The work presents the methodology of optimal designing using the multitask character of the matter which is based on the mathematical model of optimization in the concept of the set theory. To make an optimal choice of the chosen parameter, a complete computational model of an aircraft was made (aerodynamic, power unit, performance and cost) and then the method that allows to choose the bypass ratio was selected, regarding multiple estimating criteria of the obtained solutions. The presented method can be used at the concept design state for determining the chosen and most important technical parameters of the aircraft.
Findings - The way to design a competing aircraft is to choose its design parameters, including the power unit, by using the advanced methods of MOO. The main aim of the work was to demonstrate a method of selecting chosen parameters of the transport aircraft at the preliminary design stage. The work focuses on the choice of bypass ratio of the jet engine of the VLJ. The method could be helpful at the preliminary design stage of a new aircraft to selection of other design parameters.
Research limitations/implications - The exemplary calculations were made for 50 different transport tasks to take into account different performance conditions of the aircraft. The presented method can be used at the concept design state for determining the chosen and most important technical parameters of the aircraft.
Practical implications - The work shows a practical possibility to implement the proposed method. The presented method could be helpful at the preliminary design stage of a new aircraft to select its design parameters. The results of the analyses are a separate point for further research and studies.
Originality/value - The work shows a practical possibility to implement the proposed approach for design problems at early stages of product development.

• 出版日期2014