Table of Contents

Aerodynamics Series

2020년 1월 7일 화요일

Flight-SIM : DB Structure of the SIM


Previous Work Status

Missile-SIM : Performance Evaluation for Iskander / Kh-47M2 Kinzhal & ATACMS+Booster

The new topic for My page : Optimization of Supersonic aerodynamic aircraft


Flight-SIM : Trajectory & Performance Analysis for Jet Aircraft



 Compare to simple DB of Missile-SIM, Flight-SIM requires more sophisticated DB for several aspect such as weight, aircraft, trajectory options and complicated propulsion. 


 New structure of the DB is configured to consider the effect of the variables. 


1. Aircraft DB

 Weight is divided to ZFW(Zero-Fuel-Weight), Payload, and Fuel. 




 Lift, Drag, and Moment are function of Mach, AoA, and Altitude; Minimum drag change via altitude (Reynolds number) is important for Airliners. 







2. Engine DB

 Y-value of the engine DB are Thrust, Inlet effect(thrust reduction coefficient), FF(Fuel Flow), CD(Spillage Drag), CM(impact on pitching moment); these are changed by Throttle, Altitude, AoA, and Mach. 

 It would be a complex combination of those effect while format of Y-value is shared. 





3. Trajectory DB

 Trajectory input has more options than that of Missile-SIM; Take-Off, SID/STAR, Climb/Descend options should be specified to describe the airliner trajectory. 

 Step-Climb option will be made, and optimal climb/descend and cruise will be used.  




 Next time, I will made generic single-aisle airliner DB to demonstrate sample cases while I develop Flight-SIM main code. 


2020년 1월 1일 수요일

Happy New Year for All - 2020 !


 Thanks for the all guest of this blog, and Happy New Year !!

 This Year can be a very important milestone for me, and I hope that

 In 2020, I will focus on a brand new Flight-SIM and Aircraft design using the SIM
 while new idea or concept will be proposed

 (Below pic is my own X-plane Simulation)



2019년 12월 13일 금요일

Qantas select A350-1000ULR as Project Sunrise



 Several sources announced that Qantas selects A35K as their new Project Sunrise. 

 Direct airline to New York or London from Sydney. Without a doubt, it testify limit of aerodynamic efficiency of the two airliner giants, Airbus and Boeing. 

 777-8X and A350-1000ULR compete to be selected by Qantas, however, A35K has advantages in both newer technology in efficiency and operation proof by other airliners. Unfortunately, 787 series having better fuel economy is smaller for Qantas while 777X series evolved from the past cannot even complete the first flight. 

 Project Sunrise itself only ordered 12 aircraft however, it could open the new area of airlines for their range. 

 I hope there will be a new supersonic airliners in near future. 

2019년 12월 10일 화요일

Flight-SIM : Trajectory & Performance Analysis for Jet Aircraft


Previous Work Status

Missile-SIM : Performance Evaluation for Iskander / Kh-47M2 Kinzhal & ATACMS+Booster

The new topic for My page : Optimization of Supersonic aerodynamic aircraft


1. Introduction & Configuration of Flight-SIM

 As a new tool replacing Missile-SIM, I am now conducting Flight-SIM which consider more variables such as pitching moment, throttle-able engine, complex drag DB, trajectory optimization. Specifically, sophisticated trajectory optimization will be made similar to that of real-airliners.  

 Compared to Missile-SIM, it will more appropriate to evaluate range of the fixed-wing aircraft. 

 Next time, I will show the sample of the DB.