You'd better educate yourself on the principles and limitations: ... Proposing or demanding technology without a basic understanding of the fundamentals just makes us look foolish.
Thanks, Dan Thomas. That’s one of the great things about the internet: you can always count on encountering someone presumptuous enough to tell you what you’d better do.
The examples you cited…I did take a moment to glance through them, hoping to learn something new. Instead, the fundamentals of gas turbines paper took me
back in time; back to the beginning of the Reagan administration and a Powerplants 101 class led by a teaching assistant with a strong accent and a marvelous sense of humor. A time when social interactions were conducted on a personal level and more beer could solve problems that eluded the slide rule. Good times, those.
The Williams article provides a succinct history of the EJ22, but never connects the engine’s ultimate underperformance to any of the topics under discussion here. The article concludes, “Why did the EJ22 fail? Perhaps…” and offers-up nothing more than a single sentence of unsophisticated conjecture.
The University of Colorado paper gave away the game in the introduction: “…the goal of this project was to determine how to alter parameters of a set of
already-existing small-scale gas turbine engines…” [my emphasis] Clearly, the scope of the inquiry was ultimately constrained by that limitation. The paragraph continued, “On top of this, technologies were researched that could potentially make such an improvement in performance possible.” The “technologies” considered seemed limited to unremarkable methods of cooling hot section components, which were assumed to be conventional alloys. I found no mention of ceramic materials in the paper despite being relatively recent (2015-ish). But then, they did limit themselves to existing engines.
None of these examples address the use of ceramic materials in turbine engines. Maybe that’s because we’re barking up the wrong tree here, Dan Thomas. You are correct in that we need a basic understanding of the fundamentals. And to that end, I suggest that the fundamentals that we really need to educate ourselves on is materials science and engineering, with specific emphasis on ceramic composites. As one might fear, that road is long and tedious and will require considerable time and dedication, but once those concepts and their applications are understood we can begin to consider how to build a better engine using composite materials. So, to borrow some of your own words, feel free to educate yourself.