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Chemical Kinetic Rate Measurements of Fuels with the Hydroxyl Radical in Shock Tubes
Chemical Kinetic Rate Measurements of Fuels with the Hydroxyl Radical in Shock Tubes
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202104743
- ISBN
- 9798290652481
- DDC
- 620
- 서명/저자
- Chemical Kinetic Rate Measurements of Fuels with the Hydroxyl Radical in Shock Tubes
- 발행사항
- [Sl] : Stanford University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 122 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-03, Section: B.
- 주기사항
- Advisor: Hanson, Ronald.
- 학위논문주기
- Thesis (Ph.D.)--Stanford University, 2025.
- 초록/해제
- 요약Modern combustion systems aim to increase performance and reduce harmful emissions, while there is a simultaneous push toward the use of renewable and low-carbon fuels. Oxygenated fuels such as methanol and carbon-free fuels like ammonia can be employed directly, either as neat fuels or fuel additives to help achieve these goals; and advanced fuels such as Jet Propellant 10 (JP-10) offer the capability of increased performance in air-breathing propulsion systems. In order to make use of the benefits offered by these new fuel sources, their combustion must be well understood. This is typically achieved through the development of detailed chemical kinetic models that can reproduce combustion behavior under a wide range of conditions, which are often composed of hundreds, thousands, or tens of thousands of chemical reactions and their associated reaction rates. Development of accurate chemical kinetic models requires accurate knowledge of these individual reaction rates.This dissertation aims to use laser absorption measurements in shock tube experiments to provide accurate reaction rate measurements for the key oxidation pathway of fuel + OH for several important fuel molecules: methanol (CH3OH), Jet Propellant 10 (JP-10), cyclopentene (CPE), cyclopentadiene (CPD), and ammonia (NH3). Experiments were designed to follow pseudo-first order behavior, and OH profiles were measured behind incident and reflected shocks with narrowline width cw UV laser light. When necessary, fuel concentrations were measured with infrared laser absorption diagnostics. Simulations were performed using detailed chemical kinetic models, and the fuel+OH reaction rate was modified until a best-fit was found for simulated OH time histories versus measured profiles. A new experimental method was developed, allowing +OH reactions to be measured at temperatures much higher than previously achieved with tert-butyl hydroperoxide (TBHP) as an OH source. Uncertainty analyses were conducted on each set of experiments, and while the reaction of hydroxyl with JP-10 had no prior experimental data to compare to, for each of the other rate measurements the current data was found to have smaller scatter and uncertainty than previous determinations. The respective reaction rates of OH with methanol, JP-10, CPE, CPD, and ammonia are given by the following Arrhenius expressions:Uncertainty analyses were performed for each set of kinetic rate measurements. Uncertainty for k1 was -10%/+17% at 961 K and -12%/+18% at 1231 K. Uncertainty for k2was approximately ±12% across the temperature range studied. The rate k3 has associated uncertainty of -19%/+13% at 1040 K, lessening to -10%/+5% at 1274 K. Uncertainty for k4 is -7%/+10% at 1044 K and - 6%/+8% at 1236 K. The rate k5has an uncertainty of roughly ±20% throughout the temperature range 1000-2400 K.
- 일반주제명
- Kinetics
- 일반주제명
- Sensitivity analysis
- 일반주제명
- Ammonia
- 일반주제명
- Lasers
- 일반주제명
- Energy
- 일반주제명
- Mechanical engineering
- 키워드
- Shock tubes
- 기타저자
- Stanford University.
- 기본자료저록
- Dissertations Abstracts International. 87-03B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■020 ▼a9798290652481
■035 ▼a(MiAaPQ)AAI32149726
■035 ▼a(MiAaPQ)Stanfordtc114yg2085
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a620
■1001 ▼aZaczek, Luke Thomas.
■24510▼aChemical Kinetic Rate Measurements of Fuels with the Hydroxyl Radical in Shock Tubes
■260 ▼a[Sl]▼bStanford University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a122 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-03, Section: B.
■500 ▼aAdvisor: Hanson, Ronald.
■5021 ▼aThesis (Ph.D.)--Stanford University, 2025.
■520 ▼aModern combustion systems aim to increase performance and reduce harmful emissions, while there is a simultaneous push toward the use of renewable and low-carbon fuels. Oxygenated fuels such as methanol and carbon-free fuels like ammonia can be employed directly, either as neat fuels or fuel additives to help achieve these goals; and advanced fuels such as Jet Propellant 10 (JP-10) offer the capability of increased performance in air-breathing propulsion systems. In order to make use of the benefits offered by these new fuel sources, their combustion must be well understood. This is typically achieved through the development of detailed chemical kinetic models that can reproduce combustion behavior under a wide range of conditions, which are often composed of hundreds, thousands, or tens of thousands of chemical reactions and their associated reaction rates. Development of accurate chemical kinetic models requires accurate knowledge of these individual reaction rates.This dissertation aims to use laser absorption measurements in shock tube experiments to provide accurate reaction rate measurements for the key oxidation pathway of fuel + OH for several important fuel molecules: methanol (CH3OH), Jet Propellant 10 (JP-10), cyclopentene (CPE), cyclopentadiene (CPD), and ammonia (NH3). Experiments were designed to follow pseudo-first order behavior, and OH profiles were measured behind incident and reflected shocks with narrowline width cw UV laser light. When necessary, fuel concentrations were measured with infrared laser absorption diagnostics. Simulations were performed using detailed chemical kinetic models, and the fuel+OH reaction rate was modified until a best-fit was found for simulated OH time histories versus measured profiles. A new experimental method was developed, allowing +OH reactions to be measured at temperatures much higher than previously achieved with tert-butyl hydroperoxide (TBHP) as an OH source. Uncertainty analyses were conducted on each set of experiments, and while the reaction of hydroxyl with JP-10 had no prior experimental data to compare to, for each of the other rate measurements the current data was found to have smaller scatter and uncertainty than previous determinations. The respective reaction rates of OH with methanol, JP-10, CPE, CPD, and ammonia are given by the following Arrhenius expressions:Uncertainty analyses were performed for each set of kinetic rate measurements. Uncertainty for k1 was -10%/+17% at 961 K and -12%/+18% at 1231 K. Uncertainty for k2was approximately ±12% across the temperature range studied. The rate k3 has associated uncertainty of -19%/+13% at 1040 K, lessening to -10%/+5% at 1274 K. Uncertainty for k4 is -7%/+10% at 1044 K and - 6%/+8% at 1236 K. The rate k5has an uncertainty of roughly ±20% throughout the temperature range 1000-2400 K.
■590 ▼aSchool code: 0212.
■650 4▼aVolatile organic compounds--VOCs
■650 4▼aKinetics
■650 4▼aSensitivity analysis
■650 4▼aAmmonia
■650 4▼aLasers
■650 4▼aEnergy
■650 4▼aMechanical engineering
■653 ▼aShock tubes
■653 ▼aModern combustion systems
■690 ▼a0791
■690 ▼a0548
■71020▼aStanford University.
■7730 ▼tDissertations Abstracts International▼g87-03B.
■790 ▼a0212
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358727▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


