Are there efforts to develop more environmentally friendly supersonic aircraft?

Jun 1, 1991 ... It is suggested that parametric instability can be induced in a confined supersonic shear layer by the use of a periodic Mach wave system ... Subsonic conditions occur for Mach numbers less than one, M < 1 . · As the speed of the object approaches the speed of sound, the flight Mach number is nearly ... of igniting and sustaining the supersonic combustion of hydrocarbon fuels in a Mach 8 flight-candidate scramjet engine. This will be achieved through the ... ... supersonic sides when the Mach number tends to one. Several examples are solved including rectangular wings, swept wings, a supersonic transport wing and a ... The paper reproduced the first photograph of a shock wave in front of an object (in this case a bullet) moving at supersonic speed. Apr 18, 2022 ... The Mach Supersonic sits on a layer of HOKA's responsive ProFly+ midsole foam, providing a lively, energetic ride. The shoe's firm forefoot feel ... The innovative transducer design and powerful capabilities of software-based architecture are optimizing signal-to-noise ratio at each step of signal ... A computational parameter study of the viscous axisymmetric supersonic ... Mach number 8) for which is quite large. In the other cases, the gas model ... Oct 13, 2022 ... 965 to Mach 1.06—faster than the speed of sound. The transition to supersonic flight was remarkably uneventful. After flying under power from ... Lean into the future of ultrasound technology with the SuperSonic MACH 40 ultrasound imaging system that surpasses 40 years of previous ultrasound conventions ...