Journals / Uludağ Üniversitesi Mühendislik Fakültesi Dergisi / 2022 / Cilt: 27 - Sayı: 2

NUMERICAL INVESTIGATION OF X-45A TYPE UNMANNED COMBAT AIR VEHICLE

X-45A Tipi İnsansız Muharebe Hava Aracının Nümerik Olarak İncelenmesi

Pages
847–856
Publication Date
2022-08-31
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Detail about flow field, including LEV formation, vortex breakdown, interaction, and nonlinear aerodynamic characteristics of X-45 was presented and discussed.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:In this paper, the low-speed aerodynamic performance of unmanned combat air vehicle (UCAV) X-45 delta wing was investigated by a numerical method using computational fluid dynamic approaches (CFD).
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Key Findings & Data:The investigation was conducted with X-45 and the formation of leading-edge vortices (LEV) and vortex breakdown was studied by a varying angle of attack with the range of 5° to 30° at the Reynolds number of 10,000 using the SST turbulence model and are compared with experimental data to validate simulation accuracy of CFD.
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Conclusion & Impact:Detail about flow field, including LEV formation, vortex breakdown, interaction, and nonlinear aerodynamic characteristics of X-45 was presented and discussed.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:LEV · CFD · delta kanat

Abstract

In this paper, the low-speed aerodynamic performance of unmanned combat air vehicle (UCAV) X-45 delta wing was investigated by a numerical method using computational fluid dynamic approaches (CFD). The investigation was conducted with X-45 and the formation of leading-edge vortices (LEV) and vortex breakdown was studied by a varying angle of attack with the range of 5° to 30° at the Reynolds number of 10,000 using the SST turbulence model and are compared with experimental data to validate simulation accuracy of CFD. Stall conditions happened at around 30°, averaged vorticity layer demonstrates a prolonged form that goes along by narrow recirculation zones neighboring to the wing surface. Detail about flow field, including LEV formation, vortex breakdown, interaction, and nonlinear aerodynamic characteristics of X-45 was presented and discussed.

Özet

Bu çalışmada, insansız savaş hava aracı (SİHA) X-45 delta kanadının düşük hızlı aerodinamik performansı hesaplamalı akışkanlar dinamiği yaklaşımları (HAD) kullanılarak sayısal bir yöntemle incelenmiştir. İnceleme X-45 ile yürütülmüş ve öncü girdapların (LEV) oluşumu ve girdap kırılması, SST türbülans modeli kullanılarak Reynolds sayısı 10.000'de 5° ila 30° aralığında değişen bir hücum açısı ile incelenmiştir. CFD'nin simülasyon etkinliğini doğrulamak için daha önceden yapılan deneysel verilerle karşılaştırılmıştır. Stol koşulları yaklaşık 30°'de meydana gelmiş, ortalama girdap katmanı, kanat yüzeyine komşu dar döngüsel bölgeleri boyunca uzanan uzun bir form göstermektedir. LEV oluşumu, girdap bozulması ve etkileşimi ve X-45'in doğrusal olmayan aerodinamik özellikleri dahil olmak üzere akış alanı hakkında ayrıntılar sunulmuş ve tartışılmıştır.

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Cite This Article

SOĞUKPINAR, H., CAG, S. (2022). NUMERICAL INVESTIGATION OF X-45A TYPE UNMANNED COMBAT AIR VEHICLE. Uludağ Üniversitesi Mühendislik Fakültesi Dergisi, Cilt: 27 - Sayı: 2, 847–856. https://ajindex.com/articles/694519

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