본문

서브메뉴

Numerical Methods for Coupled Aeropropulsive Design Optimization
Numerical Methods for Coupled Aeropropulsive Design Optimization
Numerical Methods for Coupled Aeropropulsive Design Optimization

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260202103639
ISBN  
9798314873816
DDC  
629.1
저자명  
Abdul Kaiyoom, Mohamed Arshath Saja.
서명/저자  
Numerical Methods for Coupled Aeropropulsive Design Optimization
발행사항  
[Sl] : University of Michigan, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
292 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-11, Section: B.
주기사항  
Advisor: Martins, Joaquim R. R. A.
학위논문주기  
Thesis (Ph.D.)--University of Michigan, 2025.
초록/해제  
요약Unconventional propulsion systems are used in several innovative aircraft concepts to save energy. Airframe-propulsion integration presents new design challenges due to emerging technologies such as over-wing nacelle, boundary layer ingestion, and distributed electric propulsion. Therefore, coupled aeropropulsive design optimization is a promising field in which to investigate the trade-offs between aerodynamics and propulsion models. However, coupled aeropropulsive design optimization is a relatively new field compared to aerodynamic shape optimization and aerostructural optimization. There are still some challenges in this field that need to be addressed to perform more advanced and rapid aeropropulsive studies.In this thesis, we first develop a separation sensor to eliminate separation in gradient-based optimization. Designers often want to avoid separation at off-design conditions regardless of the drag. Therefore, we first develop a separation constraint formulation for airfoil shape optimization. Following the airfoil optimization, we also developed a novel separation sensor that is suitable for 3-D problems and used in the over-wing nacelle (OWN) coupled aeropropulsive problem in this thesis.Secondly, we develop solvers suitable for coupled systems that have saddle-point system in their Jacobian, which often results in powered boundary condition problems in coupled aeropropulsive design optimization. Simulation-based multiphysics or multidisciplinary models are fundamental building blocks of multidisciplinary design optimization frameworks that involve coupled models. Solving the coupled linear and nonlinear systems that arise from these models is challenging. One common challenge arises when the Jacobian matrices represent a saddle-point problem, where a block-diagonal corresponding to a discipline is non-invertible. These problems require a coupled solver algorithm such as Newton's method instead of the popular block Gauss-Seidel based methods because of this non-invertible block. However, implementing coupled solver methods is challenging, and they suffer from robustness issues. To address these challenges with saddle-point problems, we introduce nonlinear and linear Schur complement solvers suitable for CFD-based coupled system models. We implement the solvers in NASA's OpenM-DAO framework and demonstrate their effectiveness with two analytic problems and computational fluid dynamics based saddle-point problems: aerodynamic shape optimization of a wing and coupled aeropropulsive design optimization of a podded propulsor.Thirdly, we also develop a robust Newton solver to solve challenging pyCycle thermodynamic nonlinear problems. Solving a nonlinear system of algebraic equations is a challenging task. Newton's method is a widely used approach for solving nonlinear systems of equations. Despite providing quadratic convergence near the final solution, it may not always converge the nonlinear system when the initial solution is further away from the final solution. Therefore, we develop the multilevel preconditioned Newton method with learning capability (MPNL) solver to increase robustness and efficiency.We implement the MPNL solver in OpenMDAO.Finally, we study the aeropropulsive benefits of the OWN configuration. The OWN configuration has the potential to improve on the conventional under-wing nacelle configuration by enabling higher bypass ratios and increasing noise shielding. To explore this potential, we perform coupled aeropropulsive design optimization to study the coupled analysis and the design trade-offs between aerodynamics and propulsion. We first perform single-point optimization to study the fundamental aeropropulsive benefits and trade-offs. In this study, we also perform multipoint optimizations to understand the importance of multipoint optimization in terms of aerodynamics and propulsion. These advancements in aeropropulsive optimization are critical to OWN configuration design and more sustainable aircraft.
일반주제명  
Aerospace engineering
일반주제명  
Engineering
일반주제명  
Fluid mechanics
일반주제명  
Mechanical engineering
키워드  
Separation constraint
키워드  
Schur complement solvers
키워드  
Robust Newton solver
키워드  
Saddle-point problems
키워드  
Over-wing nacelle
키워드  
Coupled aeropropulsive design optimization
기타저자  
University of Michigan Aerospace Engineering
기본자료저록  
Dissertations Abstracts International. 86-11B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

 008260126s2025        us                              c    eng  d
■001000017358072
■00520260202103639
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798314873816
■035    ▼a(MiAaPQ)AAI32092509
■035    ▼a(MiAaPQ)umichrackham005992
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a629.1
■1001  ▼aAbdul  Kaiyoom,  Mohamed  Arshath  Saja.
■24510▼aNumerical  Methods  for  Coupled  Aeropropulsive  Design  Optimization
■260    ▼a[Sl]▼bUniversity  of  Michigan▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a292  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-11,  Section:  B.
■500    ▼aAdvisor:  Martins,  Joaquim  R.  R.  A.
■5021  ▼aThesis  (Ph.D.)--University  of  Michigan,  2025.
■520    ▼aUnconventional  propulsion  systems  are  used  in  several  innovative  aircraft  concepts  to  save  energy.  Airframe-propulsion  integration  presents  new  design  challenges  due  to  emerging  technologies  such  as  over-wing  nacelle,  boundary  layer  ingestion,  and  distributed  electric  propulsion.  Therefore,  coupled  aeropropulsive  design  optimization  is  a  promising  field  in  which  to  investigate  the  trade-offs  between  aerodynamics  and  propulsion  models.  However,  coupled  aeropropulsive  design  optimization  is  a  relatively  new  field  compared  to  aerodynamic  shape  optimization  and  aerostructural  optimization.  There  are  still  some  challenges  in  this  field  that  need  to  be  addressed  to  perform  more  advanced  and  rapid  aeropropulsive  studies.In  this  thesis,  we  first  develop  a  separation  sensor  to  eliminate  separation  in  gradient-based  optimization.  Designers  often  want  to  avoid  separation  at  off-design  conditions  regardless  of  the  drag.  Therefore,  we  first  develop  a  separation  constraint  formulation  for  airfoil  shape  optimization.  Following  the  airfoil  optimization,  we  also  developed  a  novel  separation  sensor  that  is  suitable  for  3-D  problems  and  used  in  the  over-wing  nacelle  (OWN)  coupled  aeropropulsive  problem  in  this  thesis.Secondly,  we  develop  solvers  suitable  for  coupled  systems  that  have  saddle-point  system  in  their  Jacobian,  which  often  results  in  powered  boundary  condition  problems  in  coupled  aeropropulsive  design  optimization.  Simulation-based  multiphysics  or  multidisciplinary  models  are  fundamental  building  blocks  of  multidisciplinary  design  optimization  frameworks  that  involve  coupled  models.  Solving  the  coupled  linear  and  nonlinear  systems  that  arise  from  these  models  is  challenging.  One  common  challenge  arises  when  the  Jacobian  matrices  represent  a  saddle-point  problem,  where  a  block-diagonal  corresponding  to  a  discipline  is  non-invertible.  These  problems  require  a  coupled  solver  algorithm  such  as  Newton's  method  instead  of  the  popular  block  Gauss-Seidel  based  methods  because  of  this  non-invertible  block.  However,  implementing  coupled  solver  methods  is  challenging,  and  they  suffer  from  robustness  issues.  To  address  these  challenges  with  saddle-point  problems,  we  introduce  nonlinear  and  linear  Schur  complement  solvers  suitable  for  CFD-based  coupled  system  models.  We  implement  the  solvers  in  NASA's  OpenM-DAO  framework  and  demonstrate  their  effectiveness  with  two  analytic  problems  and  computational  fluid  dynamics  based  saddle-point  problems:  aerodynamic  shape  optimization  of  a  wing  and  coupled  aeropropulsive  design  optimization  of  a  podded  propulsor.Thirdly,  we  also  develop  a  robust  Newton  solver  to  solve  challenging  pyCycle  thermodynamic  nonlinear  problems.  Solving  a  nonlinear  system  of  algebraic  equations  is  a  challenging  task.  Newton's  method  is  a  widely  used  approach  for  solving  nonlinear  systems  of  equations.  Despite  providing  quadratic  convergence  near  the  final  solution,  it  may  not  always  converge  the  nonlinear  system  when  the  initial  solution  is  further  away  from  the  final  solution.  Therefore,  we  develop  the  multilevel  preconditioned  Newton  method  with  learning  capability  (MPNL)  solver  to  increase  robustness  and  efficiency.We  implement  the  MPNL  solver  in  OpenMDAO.Finally,  we  study  the  aeropropulsive  benefits  of  the  OWN  configuration.  The  OWN  configuration  has  the  potential  to  improve  on  the  conventional  under-wing  nacelle  configuration  by  enabling  higher  bypass  ratios  and  increasing  noise  shielding.  To  explore  this  potential,  we  perform  coupled  aeropropulsive  design  optimization  to  study  the  coupled  analysis  and  the  design  trade-offs  between  aerodynamics  and  propulsion.  We  first  perform  single-point  optimization  to  study  the  fundamental  aeropropulsive  benefits  and  trade-offs.  In  this  study,  we  also  perform  multipoint  optimizations  to  understand  the  importance  of  multipoint  optimization  in  terms  of  aerodynamics  and  propulsion.  These  advancements  in  aeropropulsive  optimization  are  critical  to  OWN  configuration  design  and  more  sustainable  aircraft.
■590    ▼aSchool  code:  0127.
■650  4▼aAerospace  engineering
■650  4▼aEngineering
■650  4▼aFluid  mechanics
■650  4▼aMechanical  engineering
■653    ▼aSeparation  constraint
■653    ▼aSchur  complement  solvers
■653    ▼aRobust  Newton  solver
■653    ▼aSaddle-point  problems
■653    ▼aOver-wing  nacelle
■653    ▼aCoupled  aeropropulsive  design  optimization
■690    ▼a0538
■690    ▼a0537
■690    ▼a0548
■690    ▼a0204
■71020▼aUniversity  of  Michigan▼bAerospace  Engineering.
■7730  ▼tDissertations  Abstracts  International▼g86-11B.
■790    ▼a0127
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358072▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

Preview

Export

ChatGPT Discussion

AI Recommended Related Books


    New Books MORE
    Statistics for the past 3 years. Go to brief

    ค้นหาข้อมูลรายละเอียด

    • จองห้องพัก
    • ไม่อยู่
    • โฟลเดอร์ของฉัน
    • ขอดูแรก
    • Non-Book Loan Application
    • Nighttime Book Loan Application
    วัสดุ
    Reg No. Call No. ตำแหน่งที่ตั้ง สถานะ ยืมข้อมูล
    TF15575 전자도서 대출가능 My Folder 부재도서신고 비도서대출신청 야간 도서대출신청

    * จองมีอยู่ในหนังสือยืม เพื่อให้การสำรองที่นั่งคลิกที่ปุ่มจองห้องพัก

    Books borrowed together with this book

    Related Popular Books

    Available after logging in.