Hello all -
I'm a mech engineer, not a structural engineer, so my apologies if I get some of this terminology wrong. I have a mezzanine composed of 19W4 steel grating laid over steel C-channel joists. I want to understand the load capacity of those joists, but I'm not sure where to find...
You've probably seen this by now, but just in case, last fall Destin Sandlin uploaded a video about a pneumatic baseball cannon he and some friends built that can launch baseballs at well over 1,000 MPH. There's a 23-minute video in which they describe the design, constructions, and early tests...
AIUI, when operating a critical flow venturi (CFV) the goal is to maintain an outlet/inlet pressure ratio sufficiently low to achieve sonic flow at the throat and a normal shock wave somewhere in the downstream section. The pressure ratio should be low enough to keep that normal shock some...
I'm trying to develop a coarse model of volumetric efficiency (VE) as a function of intake manifold pressure for a heavy-duty diesel engine (~15L). For this discussion, I'm defining VE as the in-cylinder density at intake-valve closure divided by the density in the intake manifold.
I have...
I have a Meriam laminar flow element. To use it, you measure the pressure differential across the element, as well as the humidity, temperature and absolute pressure upstream of the element. Then some math happens, and you end up with a flow rate.
You can make all of those measurements with...
Gas turbine engines have maximum speed and power limits based on pressures, temperatures and mechanical loads on the parts spinning at ludicrous speed.
So...what parameters determine the MINImum RPM for a gas turbine? When that 747 is waiting for takeoff, all four engines are "idling," putting...
Greetings -
My background: I have a Ph.D. in mechanical engineering, so I'm well-versed in fluid mechanics, thermodynamics, and all that jazz.
I was recently involved in an online discussion regarding the extraction of mechanical work from the buoyancy of a hydrogen balloon. I took a stab...
