Aerodynamic Analysis of Boeing T-X

Previous articles related to T-X

-> Boeing is now T-X (2018.09)

 Boeing's proposal is now selected as T-X, I tried the rough analysis of feature of T-X

 Original images are coming from

https://3dexport.com/3dmodel-boeing-t-x-210418.htm

Boeing is Now T-X

 Boeing's proposal is now selected as T-X

https://twitter.com/search?q=boeing+t-x&ref_src=twsrc%5Egoogle%7Ctwcamp%5Eserp%7Ctwgr%5Esearch

Aerodynamic Validation of Missile-SIM for Trajectory

Previous W.I.P Status 

 Recently, I have worked some Python Missile-SIM as shown in upper link. Before, simulation is performed in regular evaluation, I verify CFD method of the Simulation. 

 Although, there is some good reference related to aerodynamics of Missile for CFD (Star-CCM & Lockheed for JCM), due to the limited resource of my laptop, I cannot fully follow rule of thumb of the reference. 

 Following aerodynamic result is the best result in my resource
(Higher resolution mesh, Density based, and Implicit method requires too much calculation cost)

 My CFD setting reach maximum 20% discrepancy at M1.6 axial force, however, except that, M2.86 result seems reasonable. Prediction of normal direction force is reasonable for both M1.6 and 2.86. 

 Mach number contour at M2.86, AoA 12deg

Pressure contour at M2.86, AoA 12deg

Temperature contour at M2.86, AoA 12deg

Aeronautical Stuff in DX 2018 Korea

 I have visited DX 2018 in Ilsan of Korea at 15th Sep. 2018. I could see Apache, KF-X model, K-2 tank. And there is some demonstration of tank corps. 

 We could see updated feature of KF-X model, export version of K-2 tank (proposed status). 

Korean Apache helicopter with Surion (KUH-1)

Korean Apache helicopter with Hellfire, 2.75in rocket, and Stinger missiles

Standard armament load-out of Apache

Gurney flap with opposite direction is interesting

Best angle of Apache... probably

Updated feature of KF-X model after PDR

(separated control surface, extended fuselage)

Korean AAA with SRAAM (Biho) and Crotale Class SAM (Chunma)

Korean K-2 Tank

Korean K-1A2

Korean K-9 self-propelled gun with K-10 (ammunition supply vehicle)

Demonstration of Korean Army Corps

Initial Version of Missile-SIM for Performance evaluation

 Recently, I have worked some Python code for Missile-Rocket-Projectile Simulation having 2DOF.

 Because I could only simulate lift/drag characteristics of the missile body as shown in Fig. 5, my simulation is relatively simple. Full 6DOF simulation work have been developed for Matlab code when the full 6DOF data, inertia, center of gravity, moment coefficient, is available, however, in most cases, it is not available. 

 Most of my article in the past was relied on estimation of hunch or prediction from common sense, however, I realized better tool for estimation is required. Although, modification of past Matlab code is easier way, study of python code is also enjoyable. 

 As a future plan, I perform CFD for supersonic reference cases via ANSA + StarCCM while improvement for this code will be done. 

 After completion, analysis for Missile/SCRAMJET/Cruise Missile is on plan

Fig. 1. Part of code based on Python 3

Fig. 2. Sample of flight trajectory of missile

Fig. 3. Sample of output trajectory of Simulation

Fig. 4. Sample of output trajectory of Simulation - Plot of Speed, Altitude, Thrust, and Range

Fig. 5. Sample of CFD analysis plan