Database Design And Implementation For Airplane Conceptual Design

At conceptual stages of aircraft development，there is vast amounts of empirical data involved.The engineers use those data frequently. In order to apply the database technology to the aircraftdesign and use the data rapidly, the database system is developed. The research uses the SQL+Asp.netwhich is very popular recently and highly efficient to implement the database. The primary works isas follows:1) Synthesizing all the factors, the system employs the B/S structure and takes the SQL as thebackground database. The core technology is WEB which is connected it to the database by theADO.net.2) The database takes an important part in the whole aircraft development system. Accordingto the requirements of large database design and the need of users. This work completed therequirement analysis of the database, framework design, logic construction design, and physicalconstruction design. The whole database system is build in the Asp.net environoment3) To build the aerodynamic database，the AVL program based on linear equations, DATCOMprogram based on engineering estimation, and FLUENT software based on N-S equations are used toget the aerodynamic data. The data is organized in the database system.4) To assist the conceptual design of a large regional jet, the overall parameters of currentregional jets and turbofans are investigated using a statistical method. Some useful statistic formulasare obtained, including relations between operating mass empty and maximum takeoff weight,between wing aspect ratio and sweep angle, between landing distance and approach speed, betweenfuel weight coefficient and design range, between fan diameter and takeoff thrust, between basicengine weight and takeoff thrust, between nacelle length and takeoff thrust, between total pressureratio and takeoff thrust, Those formula give a useful reference in defining regional jet’s overallparameters.