Integrating 3D Modeling, Photogrammetry and Design

Foster, Shaun; Halbstein, David

doi:10.1007/978-1-4471-6329-9

Cited by 18 publications

(17 citation statements)

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“…G-1 continuity is tangent where the surfaces share an edge but there is no discernible break in the transition from one surface to the next. G-2 continuity, or curvature continuity, is defined by surface planes having equivalent rates of curvature before joining; in this way, the points of surface transition become theoretically undefinable as one curved surface moves into another (Foster & Halbstein, 2014). Thus, any object capable of being visually perceived by humans can be abstracted into one of these simple line relationships.…”

Section: The Character Of Formmentioning

confidence: 99%

The line model of form and emotion: Perspectives on Western design

Urquhart

Wodehouse

2018

Human Technology

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Section: The Character Of Formmentioning

confidence: 99%

The line model of form and emotion: Perspectives on Western design

Urquhart

Wodehouse

2018

Human Technology

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“…Retopology is the improvement of an existing mesh by cleaning it up [71]. The model itself is defined by a series of points in space, and it is the mesh which defines how those points are joined to create the surface.…”

Section: Topology and Retopologymentioning

confidence: 99%

“…Computerised 3D design programs are often split into two main categories: CAD/CAM programs used in design and manufacturing industries, and artistic or animation programs used primarily in the film and gaming industries [71,72]. Whilst the software packages used in each sector may share some common features, their development occurred independently of each other, and to some extent, they have remained independent over the years [71].…”

Section: An Introduction To Cad and 3d Modellingmentioning

confidence: 99%

“…Whilst the software packages used in each sector may share some common features, their development occurred independently of each other, and to some extent, they have remained independent over the years [71].…”

Section: An Introduction To Cad and 3d Modellingmentioning

confidence: 99%

“…The three major areas which currently compose the field of '3D modelling' are Photogrammetry, Computer Vision, and Surface Topology and Retopologising [71].…”

Section: An Introduction To Cad and 3d Modellingmentioning

confidence: 99%

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Design of asymmetric shape-transition hypersonic inlets

Jones¹

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P a g e | i AbstractScramjet engines suffer performance penalties at off-design conditions, due to the fact that the engine is designed for one particular set of flight characteristics. Thermal compression has been suggested as one way of addressing poor off-design performance.For thermal compression to occur in the combustor, the incoming airflow must be of a non-uniform pressure distribution. This paper investigates the generation of a non-uniform compression field at the combustor entrance by designing an asymmetric inlet with uneven compression ratios.A complicating factor is that scramjet engines must be carefully body-integrated onto the vehicle forebody to maximise air capture and reduce drag. Any attempt at designing an inlet suitable for thermal compression must body-integrated.One challenge in designing an asymmetric inlet is the current selection of 3D surface modelling tools available to designers. The secondary goal of this project is to improve the current surface generation method for CFD analysis by identifying a new tool to carry out the design process. Ideally, the modelling process should be rapid and user-friendly.The tools selected for this project were 3DReshaper®, Blender™ andMeshLab.This project follows through the design of an asymmetric inlet using a combination of these tools, with a view to providing a non-uniform pressure distribution at the combustor entrance. The ease and usability of the modelling method was evaluated, and found to provide no real improvement over the current method. One tool, Rhinoceros®, has been identified as having potential for future investigation, due to its mesh-to-NURBS surface conversion functionality.The inlet design was tested in an Eilmer4 CFD simulation, and was found to be successful in generating non-uniform pressure distribution at Abstract P a g e | ii the outlet (Figure i). However, an unanticipated shock effect was noted in the inlet, which reduced the effectiveness of the non-uniformity. This effect was due to a shock reflection off the cowl closure point, indicating that a greater understanding of cowl placement is necessary when designing this type of inlet.Figure i -Non-uniform pressure distribution at the inlet exit due to asymmetric inlet shape.Several avenues for future research have been identified. Foremost is an investigation into the cowl closure behaviour contributing to the unwanted shock in the inlet. In addition, testing of new modelling techniques to overcome the problems identified with Blender™ and 3DReshaper® is recommended. Creating a stronger, quicker, easier design process will enable iterative designs to be created and assist in resolving the reflected shock issue. Once this has been completed, a full system analysis can be carried out to determine whether this type of thermal compression inlet has any positive effect on scramjet engine performance.

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Constructing 3‐DGIS

Yano

2017

International Encyclopedia of Geography

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This entry provides an elucidated overview of 3‐D GIS data structure and 3‐D GIS data acquisition, while introducing the latest technologies and several 3‐D city models. Many attempts have been made to convert 2‐D maps into 3‐D maps. Thanks to the shift toward GIS technology and the development of methods for acquiring new 3‐D data, detailed 3‐D city models can now be constructed. With the appearance of Google Earth and CityEngine, further enhancement of virtual geographical environments using 3‐D GIS can be anticipated.

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Integrating 3D Modeling, Photogrammetry and Design

Cited by 18 publications

References 0 publications

The line model of form and emotion: Perspectives on Western design

The line model of form and emotion: Perspectives on Western design

Design of asymmetric shape-transition hypersonic inlets

Constructing 3‐DGIS

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