Rig Test of Diesel Combustion Chamber with Piston Coated by Optically Simulated Semitransparent PSZ-Ceramic

Thermal Mode Optimization of Combustion Chamber Walls for Power-Plants Using Semitransparent Porous Ceramics

“…Stabilized zirconium oxide is distinguished from this line since it has transparence bands up to 0.4-3.4 µm (corresponding to the spectrum of short-wave radiation 1-3 µm of red-hot soot particles) that has previously been measured and proven by the authors [21]. This penetration causes the volumetric reflection r(x), the transmittance τ(x) and the absorption a(x) coefficients, which is dependent on scattering σ and absorption κ indexes for a given semitransparent material-layer thickness H [10,21]:…”

“…To obtain the calculated temperature fields, the nonlinear problem of radiant-conductive heat transfer within the semitransparent monolayer H (CC wall) was solved using the technique developed by the authors of [9,10] and similar calculation-theoretical methods of other works [5,8] for model TBMs samples. Figure 3 shows an example of simulated complex convective and radiant heating of CC thermal barrier ceramics under constant radiant heat loading~0.9 MW/m 2 ; at a constant temperature 800 K of gas mixture; heat transfer coefficient α T = 1500 W/m 2 •K; emittance of gas atmosphere ε 1~0 .4 and for exposed wall as black body 1 (in long-wave range) for ceramic single flat plates with a thickness H =10 mm for time modes of external combine heat action: Table 2 for semitransparent Y-PSZ samples (curves 1 .…”

“…Coatings 2020, 10, x FOR PEER REVIEW 4 of 13 optical properties is the determining parameter and classifies ceramics by spectral windows revealing semitransparent and opaque TBM (TBC). Lack of analysis of the influence the materials' optical transparency window on the heat resistance of the CC ceramic walls was the reason caused the suspension of the active development ceramic ICE at the end of the 20th century [2,3] and did not introduce the concept of a semitransparent ceramics wall [4,9,10] for automotive engineers.…”

“…The authors have repeatedly noted in their previous works [9,10] in 2007-2017 that despite the legendary developments of CC walls coated by ceramic as a semitransparent substance in their current researches, this factor is not considered. This is strange because there are numerous developments of opaque and semitransparent heat-shield composites for aerospace vehicles of American and Soviet engineers [12][13][14] since the 1960s.…”

“…Many scientists confirm [5][6][7][8][9][10] the intensive development of TBMs (TBCs) by the global automotive and aerospace industries. Research for decreasing costs and consumed fuel in internal combustion engines and gas turbine have been continuing.…”