JaeSan's Aeronautics: MIRV Air to Air Missile

레이블이 MIRV Air to Air Missile인 게시물을 표시합니다. 모든 게시물 표시

2023년 2월 12일 일요일

New Chinnise 6th Generation Fighter ?

* Related my previous articles for 6th Gen. Fighters (Also for Hypersonic MIRV Air-to-Air Missile)

-> History of Air-warfare Part 2 (2017.04.21)
-> French-German's proposal for replacement of Tornado jet (2018.01.28)
-> USAF-2030 Commercial (2018.03.27)
-> High AoA capability become useless in future air-warfare? (laser, stealth, hypersonic, etc) (2018.05.04)
-> Current Technical Difficulties in Hypersonic MIRV Air to Air Missile (2018.05.10)
-> Small-note-for-SRAAM and Their Futures (2018.05.23)
-> French-German's proposal for replacement of Tornado jet (2) (2018.07.06)
-> New-fighter-jet-for-UK:Tempest (2018.07.16)
-> Example-of-booster-with-SRAAM : New Solution of Long-Range Air-to-Air Missile? (2018.07.20)
-> More Information for UK's Tempest (2018.08.04)
-> Small Note for Concept of 6th Generation Fighters : And Future Aerial-Warfare (2018.09.02)

* Related my previous articles for Stealth Tankers (USN's MQ-25 and USAF's Stealth Tanker project)
-> Boeing's-mq-25-candidate is revealed (2018.03.08)
-> Lockheed's-mq-25-candidate is-revealed (2018.03.26)
-> General Atomics'-mq-25-candidate is-revealed (2018.04.02)
-> Additional-image-is-revealed-for MQ-25 of Boeing (2018.04.07)
-> Additional-image-is-released-for MQ-25 of Lockheed (2018.04.09)
-> Stealth-tanker-model-from-AFRL and Lockheed (2018.06.30)
-> Boeing's design is Now MQ-25 (2018.08.31)
-> Boeing MQ-25 - Additional Images (2018.08.31)

1. 3D Cutaway of Chinise 6th Generation fighter model

Like the other 6th generation fighter models, the chinise one also has wide wing area with two engines; combination of the two will provide more range, fuel, and capacity for electronics. Indeed, configuration is very similar to other countries' proposal.

Interesting points are splited complex LEF, relatively small engine, and distributed aparture sensors. LEF will provide efficient cruise and high AoA envelope while the small engine will be adaptive for fuel efficiency. The distributed sensor will give better S-A capability.

2. CFD? of 6th generation fighter planform

At unknown Mach number, Cp value is shown for moderate AoA region. Compared to Fig. 1, this shape is more focusing on high speed cruise; more swept for both LERX and main-wing.

3. CG

Unlike upper two pictures, it is more conventional and similar to FCAS. Caret style inlet is remarkable because J-20 chosen Divertless style.

2020년 2월 1일 토요일

Missile-SIM : Performance Evaluation for Impact of Missile-Size

Previous Work Status

Initial Version of Missile-SIM for Performance evaluation
Aerodynamic Validation of Missile-SIM for Trajectory
AIM-120C Study using Missile-SIM : Part 1 - Sensitivity
AIM-120C Study using Missile-SIM : Part 2 - Launch Condition
AIM-120C Study using Missile-SIM : Part 2 - Launch Condition - revision
Patch note of Missile-SIM : Guidance Algorithm is added w/ Real-Time plot
W.I.P status of Missile-SIM : Addition of Air-propulsion part 1
W.I.P status of Missile-SIM : Addition of Air-propulsion part 2
AIM-120C Study using Missile-SIM : Part 3 - CUDA / LREW / METEOR types. 1 : Baseline Comparison
AIM-120C Study using Missile-SIM : Part 3 - CUDA / LREW / METEOR types. 2 : Sensitivity Analysis
AIM-120C Study using Missile-SIM : Part 3 - CUDA / LREW / METEOR types. 3 : Few mentions
W.I.P status of Missile-SIM : Addition of 3D Coordinate
W.I.P status of Missile-SIM : Development of Few generic bodies for Further Missile-SIM
Missile-SIM : Performance Evaluation for ATACMS class missile
Missile-SIM : Performance Evaluation for KM-SAM class missile
Missile-SIM : Effectiveness of Rocket motor for free-fall bomb
Missile-SIM : Performance Evaluation for Iskander / Kh-47M2 Kinzhal & ATACMS+Booster

1. Modeling of Candidates for SIZE-EFFECT

While I was coding Flight-SIM, I had curiosity about impact of the size of the missile. It is generally known that larger missile can preserve its kinematic energy and has advantage for longer range.

However, how much advantage the larger-missile have ?

As the size of the missile grows, slender ratio (l/d), propellant/weight ratio, and aerodynamic configuration (fin size and shape) are changed. So, it is hard to evaluate the pure impact of the size.

At this time, I could simulate the different size of the missile with same aerodynamic-coefficient, propellant/weight ratio. It is unrealistic, because smaller air-to-air missile generally has slender profile, smaller propellant/weight ratio. Purpose of this study is only for sensitivity study for missile-size.

2. Missile-SIM Result

Simulation has been conducted for Sea-level, 15kft, 30kft for M0.5 launch conditions. Size of the missile has been varied from AIM-9's to Massive S300 SAM class. The result shows that the larger missile has slightly higher speed however difference is small compared to its size difference.

As we expected, real-difference between small and big missiles can be shown in after-burn-out phase of the missile. Because relation between weight, proportional to the dimension^3, and drag, to the dimension^2, made larger missile could glide longer range with maintained speed.

In Sea-level, AIM-9 one almost loses its energy symmetry to its burn-phase while AIM-120 class reaches twice of that, AIM-54 class three-times, and S-300 class four-times.

Due to this result, it is natural that Point-Defense Anti-Air warfare(<30km) has missile smaller than AIM-120 class, like MICA-VL, ASTOR15, Sea-Sparrow, Sea-RAM, Crotale, and ESSM. Larger than AIM-120 class is excessive and in-practical.

At the higher altitude, difference become larger. Although smaller missile could achieve longer range, AIM-54 and S-300 sized missile goes longer than 100km, without following trajectory course.

From this result, we could understand why each nation develop own missile for different size. US, usually operating offensive counter air, will develop smaller missile to carry more missiles in limited payload for longer mission. (And offensive mission should encounter shorter range of engagement). Eastern side should develop larger missile to perform aerial-denial for high-value asset of western side.

<15kft>

<30kft>

2019년 11월 21일 목요일

Russian CUDAski ?

Is that CUDAski from Russian? Thanks to JoannaRamira of Discord (https://discordapp.com/)

I will update as new information is gathered.

I have analyzed CUDA class missile in previous articles

Initial Version of Missile-SIM for Performance evaluation
Aerodynamic Validation of Missile-SIM for Trajectory
AIM-120C Study using Missile-SIM : Part 1 - Sensitivity
AIM-120C Study using Missile-SIM : Part 2 - Launch Condition
AIM-120C Study using Missile-SIM : Part 2 - Launch Condition - revision
Patch note of Missile-SIM : Guidance Algorithm is added w/ Real-Time plot
W.I.P status of Missile-SIM : Addition of Air-propulsion part 1
W.I.P status of Missile-SIM : Addition of Air-propulsion part 2
AIM-120C Study using Missile-SIM : Part 3 - CUDA / LREW / METEOR types. 1 : Baseline Comparison
AIM-120C Study using Missile-SIM : Part 3 - CUDA / LREW / METEOR types. 2 : Sensitivity Analysis
AIM-120C Study using Missile-SIM : Part 3 - CUDA / LREW / METEOR types. 3 : Few mentions

2019년 11월 13일 수요일

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

- This article is outdated; New Ballistics Analysis based on this CFD result is here

https://jaesan-aero.blogspot.com/2022/03/few-ballistic-missile-analysis-w_19.html

Except booster part, ATACMS part is same as the previous model
(Missile-SIM : Performance Evaluation for ATACMS class missile)

2. Trajectory Simulation of the Iskander / Kinzhal and ATACMS w/ Booster

Based on the modeled missile, I simulated a few trajectory options using Missile-SIM.

1) Normal version of Iskander (~170km)

It has normal short range ballistic missile characteristics; peak altitude is about 40km w/ <M5 burn out velocity.

2) Iskander-M (~250km)

Bigger ISP, slightly larger amount of propellant and better trajectory gives significantly better range than the normal version.

3) Iskander-M (~350km)

The projectile after burning whole fuel has less drag at the high altitude. Indeed if the missile glide less deeper angle, range could be extended.

4) Iskander-M (~500km)

Its maximum range is about 500km. Iskander-M missile could cover the entire Korean peninsula.

5) Iskander-M as Kinzhal = Air-launched Iskander from MiG-31 (~170km)

If the Iskander-M were launched at 40,000ft w/ M1.3, range is increased about 1,000km class. Because missile enter the 'almost-no-drag' altitude, missile has much higher burn-out velocity and longer range.

6) ATACMS+Booster (~500km)

If we given the ATACMS booster, range become similar to that of Iskander-M. (However, ATACMS has smaller warhead weight than that of Iskander-M)

7) Air-Launched ATACMS+Booster

JTACMS in the previous article (Missile-SIM : Performance Evaluation for ATACMS class missile) shows about 250km class range.

If we attached booster for JTACMS, what happens?

Similar to Iskander-M, it could extend its range for more than 1,000km.

3. Conclusion

Boosted ATACMS and Iskander-M model are compared for ground and air-launched version. Both missiles having several hundred kilometer range could have extended range using air-launched method.

I also tested hypersonic glider or three-stage rocket however, these have almost infinite range as intercontinental weapon. Indeed, I decided not to study seriously about them (as shown below)

From now on, I will focus on the upgrade of Missile-SIM as Flight-SIM for more advanced vehicle
(Supersonic Civil Aviation Area)

Appendix : Hypersonic Glider case (Almost act like a LEO projectile)