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Brigham Young University

1. Smith, Zachary Crawford. Inversion Characteristics of a Buoyant Cylindrical Puck During Oblique Water Impact.

Degree: MS, 2016, Brigham Young University

The Apollo Command Module had a tendency to flip over upon impact with the ocean surface after returning from space (9/19 times). In an effort to better characterize the inversion process for future water landing vehicles, experimental results for a simplified buoyant cylindrical puck impacting the water surface are presented. This study focuses on the dependence of inversion upon vertical velocity, horizontal velocity, and the pitch angle of the puck relative to the free surface. High-speed images reveal an asymmetric cavity that forms upon water impact. The asymmetric cavity then collapses, applying a moment, which can be sufficient to invert the puck after impact. Increasing the vertical velocity increases the likelihood of inversion. The puck never flipped over below a vertical velocity of 3.75 m/s. Increasing the horizontal velocity also slightly increases the likelihood of inversion. However, the largest effect of increasing horizontal velocity is to shift the range of impact angles for which the puck will invert to lower angles. The buoyant cylindrical puck used in this study requires a higher Froude number (4.34) to invert than previous geometries which have been studied.

Subjects/Keywords: Apollo; splashdown; inversion; water impact; water entry; buoyancy; water jet; jet impingement; Mechanical Engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Smith, Z. C. (2016). Inversion Characteristics of a Buoyant Cylindrical Puck During Oblique Water Impact. (Masters Thesis). Brigham Young University. Retrieved from https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=7107&context=etd

Chicago Manual of Style (16th Edition):

Smith, Zachary Crawford. “Inversion Characteristics of a Buoyant Cylindrical Puck During Oblique Water Impact.” 2016. Masters Thesis, Brigham Young University. Accessed May 08, 2021. https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=7107&context=etd.

MLA Handbook (7th Edition):

Smith, Zachary Crawford. “Inversion Characteristics of a Buoyant Cylindrical Puck During Oblique Water Impact.” 2016. Web. 08 May 2021.

Vancouver:

Smith ZC. Inversion Characteristics of a Buoyant Cylindrical Puck During Oblique Water Impact. [Internet] [Masters thesis]. Brigham Young University; 2016. [cited 2021 May 08]. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=7107&context=etd.

Council of Science Editors:

Smith ZC. Inversion Characteristics of a Buoyant Cylindrical Puck During Oblique Water Impact. [Masters Thesis]. Brigham Young University; 2016. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=7107&context=etd

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