<p>Combustion of kerosene propellants often deposits
soot on chamber walls. These deposits act as a thermal barrier and can
significantly affect the analysis of cooling systems. This is especially
vital for reusable engines since the accumulated soot deposit can make the wall
heat flux vary between every firing. This dissertation discusses a computational
and experimental effort to understand the main drivers of these soot deposits.
The computational approach employs the Method of Moments with Interpolative Closure
(MOMIC) model to predict soot particle dynamics; Brownian and thermophoretic
diffusion for particle transport to the chamber surface; and the
Hydrogen-Abstraction-Acetylene-Addition (HACA) mechanism for soot surface
growth. These models were incorporated in a 1D plug flow reactor. Two-dimensional
axisymmetric reacting CFD simulations were also run to understand the flow
field influence on the near wall gas phase chemistry. Simultaneously, a fuel
rich kerosene and gaseous oxygen experiment was developed and fired to obtain
soot deposit thickness measurements for model comparison. The results show the
reduced order plug flow model can satisfactorily predict the soot thickness and
that thermophoresis is the dominant deposition mechanism. However, though the
model can predict deposit mass trends, it underpredicts the absolute values for
some conditions and may need an additional mechanism. </p>
| Identifer | oai:union.ndltd.org:purdue.edu/oai:figshare.com:article/13366178 |
| Date | 14 December 2020 |
| Creators | Rufat Kulakhmetov (6598352) |
| Source Sets | Purdue University |
| Detected Language | English |
| Type | Text, Thesis |
| Rights | CC BY 4.0 |
| Relation | https://figshare.com/articles/thesis/MEASUREMENT_AND_MODELING_OF_SOOT_FORMATION_AND_DEPOSITION_IN_FUEL_RICH_HIGH_PRESSURE_KEROSENE_COMBUSTION/13366178 |
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