Aerospace Engineering Commons^™

Benefits And Challenges Of Constructing Low-Altitude Air Route Network Infrastructure For Developing Low-Altitude Economy, Xiaohan Liao, Chenchen Xu, Huping Ye

Bulletin of Chinese Academy of Sciences (Chinese Version)

Low-altitude airspace is a resource that needs to be fully explored, and the low-altitude economy is a new type of economic activity resulted from low-altitude airspace exploration and utilization. As the primary players of low-altitude flight activities, the commercialization and wide applications of unmanned aerial vehicles (UAVs) are promoting the prosperity of the low-altitude economy. A low-altitude air route network is an effective means to ensure the safe and efficient operations of a large number of UAVs, and it is also a new key infrastructure hosting low-altitude traffic. The history shows that the investment on public transport infrastructure as a …

Situation And Challenges In Development Of China’S Commercial Aerospace, Chaofeng Huang, Chao Zhang, Jinge Li, Mengru Dong

Bulletin of Chinese Academy of Sciences (Chinese Version)

Commercial aerospace is an important support for the national aerospace power strategy and a “new growth engine” for economic development, serving as a strategic pivot to win the future competitive landscape. Currently, China’s commercial aerospace industry is facing a mixed and urgent situation. On the one hand, the international competition situation is severe, with frequency track resources being seized and squeezed, international rules being passively constrained, and global market breakthroughs being hindered. On the other hand, domestic development opportunities are highlighted. The multidimensional support of central local cooperation is constantly strengthening, and the development prospects driven by industrial demand are …

Suggestions On Expanding Application Scenarios Of Commercial Aerospace Market, Mengru Dong, Chaofeng Huang, Ningyi Yang, Yu Yao, Yafeng Qin

Bulletin of Chinese Academy of Sciences (Chinese Version)

Expanding the application scenarios of the commercial aerospace market is an inevitable requirement for promoting the transformation and upgrading of the space industry and achieving the strategic goal of becoming a leading space power. Currently, the development of China’s commercial aerospace is in a critical transition period from technological breakthroughs to market expansion. However, there are still problems such as insufficient participation of private enterprises, low penetration of consumer markets, and insufficient competitiveness in the international market, and a sustainable and benign commercial closed loop has not yet been formed. The study analyzes the current situation of commercial aerospace market …

Reflections On Improving Industrial Investment And Financing Environment To Promote Healthy Development Of Commercial Aerospace, Cuilin Wu, Chao Zhang, Quan Cheng, Hongyu Wu

Bulletin of Chinese Academy of Sciences (Chinese Version)

As a new frontier in global technological competition, the sustainable development of the commercial aerospace industry highly depends on a sound and efficient investment and financing environment. Although China’s commercial aerospace investment and financing system has achieved initial progress, it still faces multiple challenges, including imbalanced capital structure, insufficient risk-sharing mechanisms, and weakened market incentives, which constrain industrial innovation and competitiveness. This study systematically analyzes the current status and main challenges of China’s commercial aerospace investment and financing environment and draws on international experience to propose following optimization strategies. First, improve the structure of capital supply and expand diversified financing …

Analysis Of Status, Challenges, And Optimization Recommendations For China’S Commercial Space Policy Support System, Liming Ge, Zixuan Liu, Mingda Yang, Wenbin Ma

Bulletin of Chinese Academy of Sciences (Chinese Version)

As a strategic pillar in building a space power, commercial space has become a new frontier for global technological competition. The Chinese government and relevant regulatory authorities have introduced a series of multi-level policy documents, propelling the commercial space sector into a phase of vigorous development. This study systematically reviews the background, evolution, and implementation outcomes of China’s policy support system for commercial space. It is indicates that, in light of the goal of becoming a “space power” and the future industrial competition, China’s policy support system for commercial space still faces challenges such as ineffective policy implementation mechanisms, lack …

Beyond Innovation Paradox: Practices And Reflections On Promoting High-Quality Development Of Commercial Aerospace With Low Costs, Chao Zhang, Qianshu Shi, Binbin Meng, Quan Cheng, Jun Zhao, Weitao Wu

Bulletin of Chinese Academy of Sciences (Chinese Version)

Commercial spaceflight, as a national strategic emerging industry, is critical for seizing the high ground of the space economy and fostering new quality productive forces through its low-cost and high-quality development. Currently, international enterprises represented by SpaceX have gained a leading advantage through technological breakthroughs and business model innovations, posing severe challenges to China’s aerospace security and development. This study first analyzes the evolutionary trajectory of low-cost development in commercial spaceflight, then delves into the “low-cost vs. high-quality” innovation paradox faced by the traditional aerospace industry and its root causes. Building on this analysis, it examines the experiences of international …

Quasi-Static Indentation Characteristics Of Foam-Filled Sandwich Composite Structures With Additively Manufactured Cfrp And Gfrp Corrugated Cores, S.Z.H. Shah, Juhyeong Lee, Khurram Altaf, M. Mohammad, M.Z. Hussain, R.S. Choudhry

Mechanical and Aerospace Engineering Faculty Publications

This paper presents an experimental investigation on the quasi-static indentation performance of polyurethane (PU) foam-filled carbon fibre-reinforced polymer (CFRP) and glass fibre-reinforced polymer (GFRP) corrugated sandwich composite structures (SCSs) under different indenter tip geometries (conical, trapezoidal, hemispherical, pyramidal, and cylindrical shapes). The SCSs were produced using hybrid manufacturing methods: (1) the facesheets were fabricated using the vacuum-assisted resin infusion (VARI) process, (2) the CFRP and GFRP corrugated cores were additively manufactured using the fused filament fabrication (FFF) process, and (3) the self-expanding PU foam-filled the open spaces in the core. The results elucidated that the indenter tip geometry and core …

The Future Of Flying: An Exploration Of New Aircraft Design And Energy Required To Support Advanced Air Mobility – Part 2, Sarah Nilsson

Publications

Lecture exploring new aircraft design and energy required to support advanced air mobility.

The Future Of Flying: An Exploration Of New Aircraft Design And Energy Required To Support Advanced Air Mobility – Part 1, Sarah Nilsson

Publications

Lecture exploring new aircraft design and energy required to support advanced air mobility.

Modeling And Simulation Of The 12-Meter Antenna, Antonio Pires

Morehead State Theses and Dissertations

A thesis presented to the faculty of the College of Science at Morehead State University in partial fulfillment of the requirements for the Degree of Master of Science by Antonio Pires on November 11, 2024.

A Probabilistic Kp And Hp Driven Auroral Boundary Model Using 28 Years Of Dmsp Data, Riley N. Troyer, Russell Landry, Michael David, Vincent Eccles, Adrian E. Acosta

Space Dynamics Laboratory Publications

This paper uses energy flux data from the DMSP F6 thru F19 satellites to construct a new equatorward auroral boundary model. This method of processing the data allows one to easily extend boundary detections to different instrument generations because it is based on a standard deviation value instead of hard thresholds. Using this method, the paper provides statistics from just under 1 million auroral boundaries between 1986 and 2014. These statistics are based on normal distribution fits for each Kp/Hp and MLT bin, which allows one to specify the boundary for an arbitrary distribution percentile. The paper compares …

Book Review: Speed, Safety, And Comfort: The Origins Of Delta Airlines, Dana Johnson

Georgia Library Quarterly

No abstract provided.

Organisational Resilience : A Study Of The Resilience Of Maritime Stakeholders In Ghana, Priscilla Ami Dogbeda Dzokoto

World Maritime University Dissertations

No abstract provided.

The Impact Of Film Cooling On The Heat Release Within A Rotating Detonation Combustor, Shreyas Ramanagar Sridhara, Antonio Andreini, Marc D. Polanka, Myles D. Bohon

Faculty Publications

Rotating detonation combustors establish a detonation wave that continuously circulates inside a small annulus. The presence of the detonation wave and the downstream oblique shock within the small annulus coupled with high mass flow induces a high heat load to the combustor wall. Preliminary analysis shows that for higher thermal power, internal air cooling alone is not sufficient to remove the heat out of the walls to maintain them below the maximum temperature of the metal. A possible solution is to use film cooling to reduce the heat flux to the combustor walls. One issue, though, is that the introduction …

Thermal Straps: Aluminum 1235 Foil Qualification Summary, Holly Mortensen

Space Dynamics Laboratory Publications

Space Dynamics Laboratory (SDL) first developed thermal strap technology in 1994 when we designed, built, and tested the SABER instrument, which is still on orbit and has performed flawlessly since 2001. Since then, we have continued to pioneer solderless flexible thermal straps and supporting technologies.

SDL’s heritage thermal straps used aluminum 1145 foil, an extremely pure alloy that contains 99.45% aluminum content. Unfortunately, it is no longer readily procurable in the market. Aluminum 1235 is a very similar alloy with similar chemical composition and physical attributes, but more readily available than 1145.

This report documents the process and results in …

Development And Testing Of A Fast-Acting, 8-Bit, Digital Throttle For Hybrid Rocket Motors, Stephen A. Whitmore

Mechanical and Aerospace Engineering Faculty Publications

The potential for throttle control of hybrid rocket systems has long been known as a potential advantage for a variety of applications. Because only a single flow path is controlled, theoretically, hybrids should be significantly easier to throttle than bipropellant systems. Unfortunately, the slow response times and nonlinearity of traditional position-control valves have limited practical applications of hybrid throttling. This paper presents an alternative throttling system where the oxidizer flow path is broken into multiple streams, with each flow path controlled by a solenoid-operated on/off valve. The parallel paths allow significantly faster and more precise control than can be achieved …

Understanding Orbits: Orbit Facts, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint Presentation created by Professor Bob Twiggs titled "Understanding Orbits: Orbit Facts" from October 22, 2024.

Understanding Orbits: Just Enough To Make You Dangerous, Robert J. Twiggs

Robert "Bob" Twiggs STEM Education Collection

A PowerPoint presentation created by Professor Bob Twiggs titled "Understanding Orbits: Just enough to make you dangerous" from October 22, 2024.

Sunrise Propulsion Subsystem Leak Rate Measurement Methodology, Alex Kirkman, Brittany Woytko, Holly Walen, Bret Maughan

Space Dynamics Laboratory Publications

As part of the integration and testing for Sun Radio Interferometer Space Experiment (SunRISE), it was necessary to characterize the propellent leak rate of the fully assembled propulsion subsystem for each satellite to ensure compliance with performance requirements. SunRISE utilized a cold gas system for its propulsion subsystem, using R-236fa propellant inside a tank made from a monolithic 3D printed SLA material. It was not possible to accurately characterize the propellent leak rate via weight by measuring the mass loss from the tank. This is due to the SLA material having both a high absorbance rate of water in normal …

Origami And Kirigami-Inspired Sandwich Panels For Uam Primary Structural Applications, Kalyan Raj Kota, Juhyeong Lee

Mechanical and Aerospace Engineering Faculty Publications

Foldcore sandwich panels (FSPs) provide highly tailorable structural and multifunctional performance over legacy sandwich panels made with honeycomb or foam cores. In FSP manufacturing, skins and foldcore are made from any flat sheets of unitary or hybrid materials, folded into a desired pattern. Two common folding mechanisms include origami and kirigami: origami core is involved with folding only, while kirigami core is associated with a strategic combination of folding and cutting. Material and core geometry can be determined to satisfy the applications’ performance requirements. Overall, origami- or kirigami-inspired FSPs have the potential to revolutionize the ways to design and …