Vortex interaction with a leading-edge of finite thickness

Vortex interaction with a thick elliptical leading-edge at zero relative offset produces a pronounced secondary vortes of opposite sense that travels with the same phase speed as the primaty vortex along the lower surface of the edge. The edge thickness (scale) relative to the incident vorticity field has a strong effect on the distortion of the incident primary vortex during the impingement processs. When the thickness is sufficiently small, there is a definite severing of the incident vortex and the portion of the incident vortex that travels along the upper part of the elliptical surface has a considerably larger phase speed than that along the lower surface; this suggests that the integrated loading along the upper surface is more strongly correlated. When the thickness becomes too large, then most, if not all, of the incident vortex passes below the leading-edge. On the other hand, the relative tranverse offset of the edge with respect to the center of the incident vortex has a significant effect on the secondary vortex formation

Free vorticity field-boundary layer conversions: Effect of boundary configuration and scale

Progress was made on further flow visualization of vortex-leading edge interaction, in conjunction with characterization of the unsteady pressure field. The range of scale of an elliptical leading edge, relative to the incident primary vortex, was determined. The scale of the incident vortex was characterized in terms of mean shear layer parameters. An overview of the interaction mechanism for the range of thin to thick leading-edges is given. The interaction mechanism corresponding to the case where the incident vortex is above the leading-edge is given for hydrogen bubble wires well upstream of and at the tip of the leading edge. A sample of the instantaneous pressure distribution for the case where the incident vortex dives beneath the edge is presented. The effect of scale of the incident vortex relative to that of the leading-edge was examined. The circulation and length scale of the incident vortices in the street are being characterized

History of the College of the Pacific, 1851-1951: Written in Commemoration of the One Hundredth Anniversary of Its Founding

https://scholarlycommons.pacific.edu/pacific-pubs/1001/thumbnail.jp

The College of the Pacific 1850-1950

Reprinted from Western College Association Addresses, Fall Meeting, November 4, 1950. University of the Pacific professor and director of the California History Foundation, Rockwell D. Hunt (aka Mr. California ) pens an address on the one hundred years of the University from 1850-1950

Golden Jubilee, University of the Pacific, San Jose, CA, 1851-1901

Pamphlet celebrating the 50-year anniversary of the University of the Pacific, with University history and photographs

History of the College of the Pacific, 1851-1951: Written in Commemoration of the One Hundredth Anniversary of Its Founding

https://scholarlycommons.pacific.edu/pacific-pubs/1001/thumbnail.jp

Critical review of the trailing edge condition in steady and unsteady flow. Blade flutter in compressors and fans: Numerical simulation of the aerodynamic loading

Existing interpretations of the trailing edge condition, addressing both theoretical and experimental works in steady, as well as unsteady flows are critically reviewed. The work of Kutta and Joukowski on the trailing edge condition in steady flow is reviewed. It is shown that for most practical airfoils and blades (as in the case of most turbomachine blades), this condition is violated due to rounded trailing edges and high frequency effects, the flow dynamics in the trailing edge region being dominated by viscous forces; therefore, any meaningful modelling must include viscous effects. The question of to what extent the trailing edge condition affects acoustic radiation from the edge is raised; it is found that violation of the trailing edge condition leads to significant sound diffraction at the tailing edge, which is related to the problem of noise generation. Finally, various trailing edge conditions in unsteady flow are discussed, with emphasis on high reduced frequencies

A study of ASRS reports involving general aviation and weather encounters

Consideration is given to the nature and characteristics of problems involving dissemination of weather information, use of this information by pilots, its adequacy for the purpose intended, the ability of the air traffic control system to cope with weather related incidents, and the various aspects of pilot behavior, aircraft equipment, and NAVAIDS affecting flights in which weather figures. It is concluded from the study that skill and training deficiencies of general aviation pilots are not major factors in weather related occurrences, nor is lack of aircraft equipment. Major problem causes are identified with timely and easily interpreted weather information, judgement and attitude factors of pilots, and the functioning of the air traffic control system

E-Mentoring Women: Lessons Learned From A Pilot Program

Mentoring has been identified as a key strategy for career development and organizational advancement and has been argued to be indispensable for women to succeed. E-mentoring has increased in popularity as a means of increasing access to mentors, especially female, and reducing some of the challenges associated with being mentored by men. Although access to mentors and mentoring is considerably improved in an e-mentoring environment, it is unclear if the quality and effectiveness of e-mentoring matches traditional mentoring. This qualitative study examines the overall effectiveness of an e-mentoring program focusing on providing psycho-social and career-development support to female mentees, developing trust in a virtual environment, and the mentee/mentor matching process

Flow Structure in a Radial Flow Pumping System Using High-Image-Density Particle Image Velocimetry[J].

Use of high-image-density particle image velocimetry (PIV