Akademik Veri Yönetim Sistemi
AIAA Science and Technology (SciTech) Forum, Maryland, Amerika Birleşik Devletleri, 23 - 27 Ocak 2023, (Tam Metin Bildiri)
The effect of opposing jets on atmospheric reentry vehicles is studied using computational fluid dynamics. Reentry is a strenuous task, especially in the case of manned entries. High drags, excessive g loads, and extreme aero-heating are experienced by the Atmospheric Reentry Vehicles. Initially, the reentry vehicles were designed for ballistic entries, but due to the high g loads experienced by the astronauts, the reentry vehicles were then designed to have lifting capabilities. The study aimed to achieve maximum drag and temperature reduction using opposite jets. Four nozzle configurations were studied on the Orion reentry capsule no-jet, single-nozzle-jet, multiple-nozzle jets located at the vehicle's periphery, and adjacent jets to the stagnation point of the vehicle. The results indicate that a single nozzle and multiple nozzles adjacent to the stagnation point are effective drag and heat reduction agents. At the same time, periphery jets, on the other hand, are good deceleration agents. The effect of the angle of attack is more adverse on single-nozzle jets than on multiple-nozzle jets. The former can conserve their performance even at extreme angles of attack.