J-factor Theory &amp; Explanation for Predicting Store Trajectory Repeatability

Jolly, Bruce; Aziz, Wali; Andrew, Clapp; Amour, Austin

doi:10.2514/6.2022-3451

Cited by 1 publication

(7 citation statements)

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“…The potential of using a pre-calculated factor to decide the release-time dependability was evaluated. The obtained result for the proposed J3 factor from the literature 28,29 is found to be promising. Although, more validation studies are necessary, using this type of factor can lead to reducing the associated computational costs and increasing the reliability of the CFD studies for store separation from cavities at high speeds.…”

Section: Discussionmentioning

confidence: 75%

“…(b) To validate the employed computational tools using wind tunnel results. (c) To check the J-factor 28,29 accuracy for predicting the release-time dependability using a generic test case.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, a special session in the 2022 AIAA (American Institute of Aeronautics and Astronautics) aviation form was dedicated to discuss this problem (the Cavity-Released Store Separation problem). Jolly et al 28 tried to quantify the release-time dependency for a cavity-store combination. The authors proposed a predictive formulation to decide the trajectory repeatability before proceeding with the trajectory simulations.…”

Section: Introductionmentioning

confidence: 99%

“…The objectives of the present work can be summarized as follows:(a) To evaluate the suitability of a set of open-source computational tools to solve the cavity flows at high speed, and to check its robustness and accuracy for predicting the store trajectory from such cavities. This has been identified as a gap in the literature, and this work tries to help in filling this gap by considering the best practices found in the open literature.(b) To validate the employed computational tools using wind tunnel results.(c) To check the J-factor 28,29 accuracy for predicting the release-time dependability using a generic test case.…”

Section: Introductionmentioning

confidence: 99%

“…(c) To check the J-factor 28,29 accuracy for predicting the release-time dependability using a generic test case.…”

Section: Introductionmentioning

confidence: 99%

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Numerical investigation of store separation from cavity problems at high speeds

Abuhanieh,

Akay

2023

Proceedings of the Institution of Mechanical Engineers, Part G:

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In this work, the ability of open-source CFD tools to conduct store separation simulations from cavities is evaluated and validated using a generic test case from the literature. Firstly, the ability and accuracy of these tools for solving cavity flows at high speeds are evaluated. Secondly, their competence in predicting the trajectory of a generic store from a generic deep cavity is checked. Finally, and in order to reduce the associated computational costs, a release-time dependability factor from the recent literature is studied and evaluated. The obtained results using the selected open-source CFD tools matched quite well with the wind tunnel results. Furthermore, the results show that predicting the release-time dependability using a quantified index/factor can be a potential remedy for reducing the computational cost for this type of CFD simulations.

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Section: Discussionmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%