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Company Information:

Name: D & P LLC
Address: 3409 N. 42nd Pl.
Phoenix, AZ
Located in HUBZone: No
Woman-Owned: No
Minority-Owned: No
Phone: (480) 518-0981

Award Totals:

Program/Phase Award Amount ($) Number of Awards
SBIR Phase I $968,673.00 10
SBIR Phase II $1,849,967.00 3
STTR Phase I $219,959.00 2

Award List:

Reduced-Order Modeling of Rotor Induced Flow with Shipboard Interactions

Award Year / Program / Phase: 2007 / SBIR / Phase I
Agency / Branch: DOD / NAVY
Principal Investigator: Lei Tang, President
Award Amount: $79,926.00
Abstract:
This SBIR Phase I project proposes to use overset grid HRLES (Hybrid RANS/LES) approach to simulate helicopter shipboard operations. After obtaining the computational results at a set of training points with this robust but computationally intensive approach, the principal basis functions of the… More

Gas-Kinetic Simulation of Separated Flows

Award Year / Program / Phase: 2007 / SBIR / Phase I
Agency / Branch: DOD / DARPA
Principal Investigator: Lei Tang, President
Award Amount: $98,981.00
Abstract:
This SBIR project proposes to develop a gas-kinetic CFD solver for separated flow simulation. Compared with the traditional macroscopic CFD approach, a gas-kinetic CFD approach is more suitable for turbulent separated flow simulation. This is because a gas-kinetic model with the turbulence… More

Gas-Kinetic Navier-Stokes Solver for Hypersonic Flows in Thermal and Chemical Non-Equilibrium

Award Year / Program / Phase: 2007 / SBIR / Phase I
Agency: NASA
Principal Investigator: Lei L. Tang, Principal Investigator
Award Amount: $99,955.00
Abstract:
This SBIR project proposes to develop a gas-kinetic Navier-Stokes solver for simulation of hypersonic flows in thermal and chemical non-equilibrium. The Navier-Stokes solvers adopted in current hypersonic CFD codes like LAURA and GASP use Riemann solver for the convection part and central scheme for… More

A Coupled Computational Aeroelasticity and Thermal Response Analysis Tool

Award Year / Program / Phase: 2008 / SBIR / Phase I
Agency / Branch: DOD / USAF
Principal Investigator: Lei Tang, President
Award Amount: $99,968.00
Abstract:
This Small Business Innovation Research Phase I project develops a coupled computational aeroelasticity and thermal response analysis tool that can be used to analyze and design ballistic reentry vehicles and Trajectory Shaping Vehicles (TSV). In Phase I, a well validated thermal response analysis… More

An Efficient CFD Algorithm for Store Separation Prediction

Award Year / Program / Phase: 2008 / SBIR / Phase I
Agency / Branch: DOD / NAVY
Principal Investigator: Lei Tang, President
Award Amount: $79,942.00
Abstract:
This SBIR Phase I project proposes to develop an efficient Computational Fluid Dynamics algorithm for store separation prediction. Compared with overset grid approach, the proposed approach avoids the tedious process for fixing the so-called "orphan points", the failed interpolation grid points.… More

Gas-Kinetic Computational Algorithms for Hypersonic Flows in Continuum and Transitional Regimes

Award Year / Program / Phase: 2008 / SBIR / Phase I
Agency: NASA
Principal Investigator: Lei Tang, Principal Investigator
Award Amount: $99,992.00
Abstract:
This SBIR Phase I project explores two gas-kinetic computational algorithms for simulation of hypersonic flows in both continuum and transitional regimes. One is the gas-kinetic BGK-Burnett solver and the other is the gas-kinetic BGK solver with the regulated particle collision time. Different from… More

A Cartesian Mesh Method For Turbulent Flow Simulation

Award Year / Program / Phase: 2008 / STTR / Phase I
Agency / Branch: DOD / NAVY
Research Institution: NORTH CAROLINA STATE UNIV.
Principal Investigator: Lei Tang, President
Award Amount: $69,987.00
RI Contact: Hong Luo
Abstract:
This STTR Phase I project proposes to develop a Cartesian mesh solver for high Reynolds number turbulent flow simulations. Due to its ease of grid generation, simplicity of flow solver, lower computational storage requirement, significantly less operational count per cell, and also due to rapid… More

Gas-Kinetic Simulation of Separated Flows

Award Year / Program / Phase: 2008 / SBIR / Phase II
Agency / Branch: DOD / DARPA
Principal Investigator: Lei Tang, President
Award Amount: $749,891.00
Abstract:
This SBIR project proposes to develop a gas-kinetic CFD solver for separated turbulent flow simulation. After successfully developing prototype two-dimensional gas-kinetic BGK-NS/Burnett solvers and demonstrating the benefits of using higher-order hydrodynamic equations for separated turbulent flow… More

STTR Phase I: Experimentally Validated Simulation Tool for Two-Phase Microscale Flows

Award Year / Program / Phase: 2008 / STTR / Phase I
Agency: NSF
Research Institution: Purdue University
Principal Investigator: Yichuan Fang, PhD
Award Amount: $149,972.00
RI Contact: Suresh Garimella
Abstract:
This Small Business Technology Transfer (STTR) Phase I project will develop a two-phase cooling system analysis tool based on a two-phase gas-kinetic BGK-Burnett solver. Different from the macroscopic Burnett approach, the gas-kinetic BGK-Burnett solver is unconditionally stable for all Knudsen… More

A Computational Tool for Modeling Geometric Proximity of Independent Systems

Award Year / Program / Phase: 2009 / SBIR / Phase I
Agency / Branch: DOD / USAF
Principal Investigator: Lei Tang, President
Award Amount: $99,948.00
Abstract:
This SBIR Phase I project proposes to develop an accurate viscous CFD algorithm which can include various small gaps between both static and moving components into the analysis. It is not an easy task to model those small gaps in the current CFD codes due to the geometric proximity, especially for… More

An Efficient CFD Algorithm for Store Separation Prediction

Award Year / Program / Phase: 2010 / SBIR / Phase II
Agency: DOD
Principal Investigator: Lei Tang, President – (602) 957-2868
Award Amount: $749,987.00
Abstract:
This Small Business Innovation Research project proposes to develop a hybrid Cartesian grid/gridless solver for fast prediction of store separation. In this approach, a Cartesian grid is used to cover the majority of the computational domain except near the body surfaces to take advantages of ease… More

Reduced-order Modeling of Rotor-Airwake Aerodynamic Coupling

Award Year / Program / Phase: 2011 / SBIR / Phase I
Agency: DOD
Principal Investigator: Lei Tang, President – (602) 957-2868
Award Amount: $79,980.00
Abstract:
This SBIR Phase I project proposes to develop a reduced-order model (ROM) of rotor-airwake aerodynamic coupling for further incorporation into a real-time flight simulator. A CFD rotor-airwake database will be used to design the reduced-order model. The output of the algorithm is the complete flow… More

An Efficient CFD Algorithm for Store Separation Prediction

Award Year / Program / Phase: 2013 / SBIR / Phase II
Agency: DOD
Principal Investigator: Lei Tang, President – (480) 518-0981
Award Amount: $350,089.00
Abstract:
This Small Business Innovation Research project proposes to develop a hybrid Cartesian grid/gridless solver for fast prediction of store separation. In this approach, multi-block structured Cartesian grids with varying grid resolution are used to cover the majority of the computational domain except… More

A Tool to Improve the Prediction of Resonant Stress in Turbine Components

Award Year / Program / Phase: 2013 / SBIR / Phase I
Agency: DOD
Principal Investigator: Lei Tang, President – (480) 518-0981
Award Amount: $149,990.00
Abstract:
ABSTRACT: This SBIR project proposes to develop a computational aeroelasticity tool for improving the prediction of both aerodynamic forcing and aerodynamic damping and thereby resonant stresses in turbine components. This will be achieved by developing an interface between our CFD software,… More

Multiscale Lagrangian-Eulerian Algorithm for Determining the Vorticity Confinement Term for Rotorcraft Computational Fluid Dynamics (CFD) Computations

Award Year / Program / Phase: 2014 / SBIR / Phase I
Agency / Branch: DOD / NAVY
Principal Investigator: Lei Tang, President – (480) 518-0981
Award Amount: $79,991.00
Abstract:
This SBIR Phase I project proposes to develop a multi-scale computational algorithm to determine the vorticity confinement term for rotorcraft Computational Fluid Dynamics (CFD) computations. Similar to the Large Eddy Simulation approach, the proposed approach simulates the large scales in the flow… More