Just FYI I think this is a Masters thesis that works with the basic geometry of an J-50-adjacent aircraft and uses a different intake design than what is on the real prototype. The most useful part of the paper is probably the two figures showing the fuselage layout, and any conclusions the paper makes on the intake performance should be treated with caution.
This is just a master's thesis. It is hard to believe that the author's supervisor would allow the use and disclosure of unencrypted data.
Lots of advanced research are outsourced to universities which in turn becomes some poor overworked postgrad's research topic
Yes and no. Even if it is handed over to postgrad, they will not be allowed to publish the results without authorization.
True, nonetheless this paper’s intake design deviates from the prototypes quite significantly so let’s not jump to conclusions with its results
the m1.8 supercruise is huge if true. Also, could this special intake be the reason for the groove?
EDIT: oh my god r/aviation is straight up crashing out over this photo right nowI have never seen this much cope
Not really "huge." The F-22 can supercruise at at least M1.76 and I expect that the J-20A can too. What would be more impressive is if it can sustain it for much longer.
Yes.
Very interesting design choice, boundary layer suction here could possibly keep flow from seperating at higher AoA. The forebody of this aircraft may work as a less energy efficient strake to generate vortices, if so, the more energy taken away means eaiser for flow seperation to happen at high AoA, so thise device is needed. It could also be that this body's aerodynamic is closer to a flying wing and flow seperation above fuselage is a great loss of reference wing area, and therefore enough to be considered a stall situation. Either way, this is likely to be used to delay stall at low speed, so it's an emphasize on agility at low speed, consistent with the TVC design choice.
Firstly I think the porous section on the back is likely used as a “exhaust”, if you will, of the boundary suction plate on the intake wall, and doesn’t suck BL from the back of the aircraft.