Prediction of Lift Coefficient for Tandem Wing Configuration or Multiple-Lifting-Surface System Using Prandtl’s Lifting-Line Theory

Propeller blade stress estimates using lifting line theory

OPENPROP, an open-source computational tool for the design and analysis of propellers and horizontal-axis turbines, is extended to provide estimates of normal stresses in the blades for both onand off-design operating conditions. The numerical model is based on propeller lifting theory, and the present implementation of the code includes an analysis capability to estimate the off-design perform...

Normalized Lift: An Energy Interpretation of the Lift Coefficient Simplifies Comparisons of the Lifting Ability of Rotating and Flapping Surfaces

For a century, researchers have used the standard lift coefficient C(L) to evaluate the lift, L, generated by fixed wings over an area S against dynamic pressure, ½ρv(2), where v is the effective velocity of the wing. Because the lift coefficient was developed initially for fixed wings in steady flow, its application to other lifting systems requires either simplifying assumptions or complex ad...

Novel Polypropylene Barbed Threads for Midface Lift—“REEBORN Lifting”

Ji Hoon Kim, MD Jae Don Seo, MD Jae Don Plastic Clinic Seoul, Republic of Korea Sir: I recent years, minimally invasive procedures for facial rejuvenation have become more popular. In 2012, the official statistics of the American Society of Plastic Surgery showed that the cosmetic surgical procedures decreased 12% when compared with 2000, but in the same time period, minimally invasive cosmetic...

Numerical Aspects of Unsteady Lifting-surface Theory at Supersonic Speeds

A general theory for gauge-free lifting

A theory for lifting equations of motion for charged particle dynamics, subject to given electromagnetic like forces, up to a gauge-free system of coupled Hamiltonian Vlasov-Maxwell like equations is given. The theory provides very general expressions for the polarization and magnetization vector fields in terms of the particle dynamics description of matter. Thus, as is common in plasma physic...